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Dear all,

I'm running some tests with cvtColor and valgrind reports a memory leak.

Some information about the environment:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

$ uname --all
Linux <hidden> 3.16.0-34-generic #47~14.04.1-Ubuntu SMP Fri Apr 10 17:49:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ pkg-config --modversion opencv
2.4.8

$ g++ --version
g++ (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ valgrind --version
valgrind-3.10.0.SVN

This is a short standalone sample:

$ cat test.cpp 
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>

int main()
{
    std::cout << cv::getBuildInformation() << std::endl;

    cv::Mat src = cv::Mat::zeros(5, 5, CV_8UC3);
    cv::Mat dst;

    cv::cvtColor( src, dst, CV_BGR2GRAY );
}


$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test  $(pkg-config --cflags --libs opencv) 
<nothing printed on screen>

And the output from valgrind:

$ valgrind --leak-check=full ./test 
==15342== Memcheck, a memory error detector
==15342== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==15342== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==15342== Command: ./test
==15342== 

General configuration for OpenCV 2.4.8 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.2.0-58-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               Release

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/x86_64-linux-gnu-g++  (ver 4.8.2)
    C++ flags (Release):         -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C++ flags (Debug):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/x86_64-linux-gnu-gcc
    C flags (Release):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C flags (Debug):             -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Linker flags (Debug):        -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml objdetect video contrib legacy photo gpu java ocl python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.22)
    GThread :                    YES (ver 2.39.90)
    GtkGlExt:                    YES (ver 1.2.0)
    OpenGL support:              YES (/usr/lib/x86_64-linux-gnu/libGLU.so /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libSM.so /usr/lib/x86_64-linux-gnu/libICE.so /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libXext.so)

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.3)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   NO
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     YES (ver 4.2 interface 7000)
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.8.0.dev-95f7a46)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  NO

  Documentation:
    Build Documentation:         YES
    Sphinx:                      /usr/bin/sphinx-build (ver 1.2.1)
    PdfLaTeX compiler:           /usr/bin/pdflatex

  Tests and samples:
    Tests:                       NO
    Performance tests:           YES
    C/C++ Examples:              YES

  Install path:                  /usr

  cvconfig.h is in:              /build/buildd/opencv-2.4.8+dfsg1/obj-x86_64-linux-gnu
-----------------------------------------------------------------


==15342== 
==15342== HEAP SUMMARY:
==15342==     in use at exit: 4,616 bytes in 9 blocks
==15342==   total heap usage: 52 allocs, 43 frees, 17,572 bytes allocated
==15342== 
==15342== 3,096 bytes in 3 blocks are possibly lost in loss record 7 of 7
==15342==    at 0x4C2B800: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==15342==    by 0x68C923B: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C95BD: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C7B02: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C7359: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C5800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==15342==    by 0x4FD9489: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /usr/lib/x86_64-linux-gnu/libopencv_core.so.2.4.8)
==15342==    by 0x534E89B: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so.2.4.8)
==15342==    by 0x535BDDD: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so.2.4.8)
==15342==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==15342== 
==15342== LEAK SUMMARY:
==15342==    definitely lost: 0 bytes in 0 blocks
==15342==    indirectly lost: 0 bytes in 0 blocks
==15342==      possibly lost: 3,096 bytes in 3 blocks
==15342==    still reachable: 1,520 bytes in 6 blocks
==15342==         suppressed: 0 bytes in 0 blocks
==15342== Reachable blocks (those to which a pointer was found) are not shown.
==15342== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==15342== 
==15342== For counts of detected and suppressed errors, rerun with: -v
==15342== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

Is this the expected output? What am I missing in order to fix this memory leak?

Thanks and best regards!

Dear all,

I'm running some tests with cvtColor and valgrind reports a memory leak.

Some information about the environment:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

$ uname --all
Linux <hidden> 3.16.0-34-generic #47~14.04.1-Ubuntu SMP Fri Apr 10 17:49:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ pkg-config --modversion opencv
2.4.8

$ g++ --version
g++ (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ valgrind --version
valgrind-3.10.0.SVN

This is a short standalone sample:

$ cat test.cpp 
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>

int main()
{
    std::cout << cv::getBuildInformation() << std::endl;

    cv::Mat src = cv::Mat::zeros(5, 5, CV_8UC3);
    cv::Mat dst;

    cv::cvtColor( src, dst, CV_BGR2GRAY );
}


$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test  $(pkg-config --cflags --libs opencv) 
<nothing printed on screen>

And the output from valgrind:

$ valgrind --leak-check=full ./test 
==15342== Memcheck, a memory error detector
==15342== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==15342== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==15342== Command: ./test
==15342== 

General configuration for OpenCV 2.4.8 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.2.0-58-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               Release

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/x86_64-linux-gnu-g++  (ver 4.8.2)
    C++ flags (Release):         -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C++ flags (Debug):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/x86_64-linux-gnu-gcc
    C flags (Release):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C flags (Debug):             -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Linker flags (Debug):        -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml objdetect video contrib legacy photo gpu java ocl python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.22)
    GThread :                    YES (ver 2.39.90)
    GtkGlExt:                    YES (ver 1.2.0)
    OpenGL support:              YES (/usr/lib/x86_64-linux-gnu/libGLU.so /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libSM.so /usr/lib/x86_64-linux-gnu/libICE.so /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libXext.so)

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.3)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   NO
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     YES (ver 4.2 interface 7000)
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.8.0.dev-95f7a46)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  NO

  Documentation:
    Build Documentation:         YES
    Sphinx:                      /usr/bin/sphinx-build (ver 1.2.1)
    PdfLaTeX compiler:           /usr/bin/pdflatex

  Tests and samples:
    Tests:                       NO
    Performance tests:           YES
    C/C++ Examples:              YES

  Install path:                  /usr

  cvconfig.h is in:              /build/buildd/opencv-2.4.8+dfsg1/obj-x86_64-linux-gnu
-----------------------------------------------------------------


==15342== 
==15342== HEAP SUMMARY:
==15342==     in use at exit: 4,616 bytes in 9 blocks
==15342==   total heap usage: 52 allocs, 43 frees, 17,572 bytes allocated
==15342== 
==15342== 3,096 bytes in 3 blocks are possibly lost in loss record 7 of 7
==15342==    at 0x4C2B800: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==15342==    by 0x68C923B: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C95BD: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C7B02: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C7359: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C5800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==15342==    by 0x4FD9489: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /usr/lib/x86_64-linux-gnu/libopencv_core.so.2.4.8)
==15342==    by 0x534E89B: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so.2.4.8)
==15342==    by 0x535BDDD: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so.2.4.8)
==15342==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==15342== 
==15342== LEAK SUMMARY:
==15342==    definitely lost: 0 bytes in 0 blocks
==15342==    indirectly lost: 0 bytes in 0 blocks
==15342==      possibly lost: 3,096 bytes in 3 blocks
==15342==    still reachable: 1,520 bytes in 6 blocks
==15342==         suppressed: 0 bytes in 0 blocks
==15342== Reachable blocks (those to which a pointer was found) are not shown.
==15342== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==15342== 
==15342== For counts of detected and suppressed errors, rerun with: -v
==15342== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

Is this the expected output? What am I missing in order to fix this memory leak?

Thanks and best regards!

$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=<opencv_install_path> ..
$ make -j9
$ make -j9 install

$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test -I<opencv_install_path>/include/opencv <opencv_install_path>/lib/libopencv_core.so <opencv_install_path>/lib/libopencv_imgproc.so

$ LD_LIBRARY_PATH=<opencv_install_path>/lib/:$LD_LIBRARY_PATH valgrind --leak-check=full ./test
==18997== Memcheck, a memory error detector
==18997== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==18997== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==18997== Command: ./test
==18997== 

General configuration for OpenCV 2.4.11 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.16.0-34-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               RELEASE

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/c++  (ver 4.8.4)
    C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/cc
    C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      
    Linker flags (Debug):        
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib java python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda viz

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.23)
    GThread :                    YES (ver 2.40.2)
    GtkGlExt:                    NO
    OpenGL support:              NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.4)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   
      base:                      YES (ver 0.10.36)
      video:                     YES (ver 0.10.36)
      app:                       YES (ver 0.10.36)
      riff:                      YES (ver 0.10.36)
      pbutils:                   YES (ver 0.10.36)
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l1 (ver 1.0.1) / libv4l2 (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     NO
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Include path:                /home/gfolego/packages/opencv-2.4.11/3rdparty/include/opencl/1.2
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/local/lib/python2.7/dist-packages/numpy/core/include (ver 1.9.2)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  YES

  Documentation:
    Build Documentation:         NO
    Sphinx:                      NO
    PdfLaTeX compiler:           /usr/bin/pdflatex
    Doxygen:                     YES (/usr/bin/doxygen)

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  /home/gfolego/packages/opencv-2.4.11/release/installed

  cvconfig.h is in:              /home/gfolego/packages/opencv-2.4.11/release
-----------------------------------------------------------------


==18997== 
==18997== HEAP SUMMARY:
==18997==     in use at exit: 0 bytes in 0 blocks
==18997==   total heap usage: 27 allocs, 27 frees, 10,961 bytes allocated
==18997== 
==18997== All heap blocks were freed -- no leaks are possible
==18997== 
==18997== For counts of detected and suppressed errors, rerun with: -v
==18997== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=<opencv_install_path> -D WITH_TBB=ON ..
$ make -j9
$ make -j9 install

$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test -I/home/gfolego/packages/opencv-2.4.11/release/installed/include/opencv /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so

$ LD_LIBRARY_PATH=/home/gfolego/packages/opencv-2.4.11/release/installed/lib/:$LD_LIBRARY_PATH valgrind --leak-check=full ./test 
==31226== Memcheck, a memory error detector
==31226== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==31226== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==31226== Command: ./test
==31226== 

General configuration for OpenCV 2.4.11 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.16.0-34-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               RELEASE

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/c++  (ver 4.8.4)
    C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/cc
    C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      
    Linker flags (Debug):        
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib java python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda viz

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.23)
    GThread :                    YES (ver 2.40.2)
    GtkGlExt:                    NO
    OpenGL support:              NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.4)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   
      base:                      YES (ver 0.10.36)
      video:                     YES (ver 0.10.36)
      app:                       YES (ver 0.10.36)
      riff:                      YES (ver 0.10.36)
      pbutils:                   YES (ver 0.10.36)
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l1 (ver 1.0.1) / libv4l2 (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     YES (ver 4.2 interface 7000)
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Include path:                /home/gfolego/packages/opencv-2.4.11/3rdparty/include/opencl/1.2
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/local/lib/python2.7/dist-packages/numpy/core/include (ver 1.9.2)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  YES

  Documentation:
    Build Documentation:         NO
    Sphinx:                      NO
    PdfLaTeX compiler:           /usr/bin/pdflatex
    Doxygen:                     YES (/usr/bin/doxygen)

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  /home/gfolego/packages/opencv-2.4.11/release/installed

  cvconfig.h is in:              /home/gfolego/packages/opencv-2.4.11/release
-----------------------------------------------------------------


==31226== 
==31226== HEAP SUMMARY:
==31226==     in use at exit: 24,160 bytes in 60 blocks
==31226==   total heap usage: 92 allocs, 32 frees, 36,209 bytes allocated
==31226== 
==31226== 192 bytes in 1 blocks are possibly lost in loss record 1 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x6716339: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719175: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671987D: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719994: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719AE4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 2 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719971: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719AE4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 3 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B3F8: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 4 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BD97: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BEF4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671D720: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671C811: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719361: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 5 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BD97: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717786: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 6 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BD97: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671CF12: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77D50: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 520 bytes in 1 blocks are possibly lost in loss record 7 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671D70A: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671C811: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719361: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 1,024 bytes in 1 blocks are possibly lost in loss record 8 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x6715CC1: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671634C: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719175: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671987D: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719994: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719AE4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226== 
==31226== 1,536 bytes in 24 blocks are possibly lost in loss record 9 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x6711BC9: tbb::internal::allocate_via_handler_v3(unsigned long) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B2CB: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 3,096 bytes in 3 blocks are possibly lost in loss record 10 of 12
==31226==    at 0x4C2B800: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671B23B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 3,584 bytes in 1 blocks are possibly lost in loss record 11 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B594: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 12,288 bytes in 24 blocks are possibly lost in loss record 12 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x6711BC9: tbb::internal::allocate_via_handler_v3(unsigned long) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B2EC: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== LEAK SUMMARY:
==31226==    definitely lost: 0 bytes in 0 blocks
==31226==    indirectly lost: 0 bytes in 0 blocks
==31226==      possibly lost: 24,160 bytes in 60 blocks
==31226==    still reachable: 0 bytes in 0 blocks
==31226==         suppressed: 0 bytes in 0 blocks
==31226== 
==31226== For counts of detected and suppressed errors, rerun with: -v
==31226== ERROR SUMMARY: 12 errors from 12 contexts (suppressed: 0 from 0)

Dear all,

I'm running some tests with cvtColor and valgrind reports a memory leak.

Some information about the environment:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.2 LTS
Release:    14.04
Codename:   trusty

$ uname --all
Linux <hidden> 3.16.0-34-generic #47~14.04.1-Ubuntu SMP Fri Apr 10 17:49:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ pkg-config --modversion opencv
2.4.8

$ g++ --version
g++ (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ valgrind --version
valgrind-3.10.0.SVN

This is a short standalone sample:

$ cat test.cpp 
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>

int main()
{
    std::cout << cv::getBuildInformation() << std::endl;

    cv::Mat src = cv::Mat::zeros(5, 5, CV_8UC3);
    cv::Mat dst;

    cv::cvtColor( src, dst, CV_BGR2GRAY );
}


$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test  $(pkg-config --cflags --libs opencv) 
<nothing printed on screen>

And the output from valgrind:

$ valgrind --leak-check=full ./test 
==15342== Memcheck, a memory error detector
==15342== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==15342== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==15342== Command: ./test
==15342== 

General configuration for OpenCV 2.4.8 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.2.0-58-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               Release

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/x86_64-linux-gnu-g++  (ver 4.8.2)
    C++ flags (Release):         -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C++ flags (Debug):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/x86_64-linux-gnu-gcc
    C flags (Release):           -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security  -DNDEBUG
    C flags (Debug):             -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2    -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Linker flags (Debug):        -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml objdetect video contrib legacy photo gpu java ocl python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.22)
    GThread :                    YES (ver 2.39.90)
    GtkGlExt:                    YES (ver 1.2.0)
    OpenGL support:              YES (/usr/lib/x86_64-linux-gnu/libGLU.so /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libSM.so /usr/lib/x86_64-linux-gnu/libICE.so /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libXext.so)

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.3)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   NO
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     YES (ver 4.2 interface 7000)
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.8.0.dev-95f7a46)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  NO

  Documentation:
    Build Documentation:         YES
    Sphinx:                      /usr/bin/sphinx-build (ver 1.2.1)
    PdfLaTeX compiler:           /usr/bin/pdflatex

  Tests and samples:
    Tests:                       NO
    Performance tests:           YES
    C/C++ Examples:              YES

  Install path:                  /usr

  cvconfig.h is in:              /build/buildd/opencv-2.4.8+dfsg1/obj-x86_64-linux-gnu
-----------------------------------------------------------------


==15342== 
==15342== HEAP SUMMARY:
==15342==     in use at exit: 4,616 bytes in 9 blocks
==15342==   total heap usage: 52 allocs, 43 frees, 17,572 bytes allocated
==15342== 
==15342== 3,096 bytes in 3 blocks are possibly lost in loss record 7 of 7
==15342==    at 0x4C2B800: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==15342==    by 0x68C923B: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C95BD: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C7B02: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C7359: ??? (in /usr/lib/libtbb.so.2)
==15342==    by 0x68C5800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==15342==    by 0x4FD9489: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /usr/lib/x86_64-linux-gnu/libopencv_core.so.2.4.8)
==15342==    by 0x534E89B: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so.2.4.8)
==15342==    by 0x535BDDD: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /usr/lib/x86_64-linux-gnu/libopencv_imgproc.so.2.4.8)
==15342==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==15342== 
==15342== LEAK SUMMARY:
==15342==    definitely lost: 0 bytes in 0 blocks
==15342==    indirectly lost: 0 bytes in 0 blocks
==15342==      possibly lost: 3,096 bytes in 3 blocks
==15342==    still reachable: 1,520 bytes in 6 blocks
==15342==         suppressed: 0 bytes in 0 blocks
==15342== Reachable blocks (those to which a pointer was found) are not shown.
==15342== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==15342== 
==15342== For counts of detected and suppressed errors, rerun with: -v
==15342== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

Is this the expected output? What am I missing in order to fix this memory leak?

Thanks and best regards!

====================

[UPDATE 2015-07-20]

After some more tests, I found out that the memory leak occurs when OpenCV is built with TBB support. These are the results using OpenCV 2.4.11.

Building OpenCV:

$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=<opencv_install_path> ..
$ make -j9
$ make -j9 install

Building sample:

$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test -I<opencv_install_path>/include/opencv <opencv_install_path>/lib/libopencv_core.so <opencv_install_path>/lib/libopencv_imgproc.so

And the output:

$ LD_LIBRARY_PATH=<opencv_install_path>/lib/:$LD_LIBRARY_PATH valgrind --leak-check=full ./test
==18997== Memcheck, a memory error detector
==18997== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==18997== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==18997== Command: ./test
==18997== 

General configuration for OpenCV 2.4.11 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.16.0-34-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               RELEASE

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/c++  (ver 4.8.4)
    C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/cc
    C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      
    Linker flags (Debug):        
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib java python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda viz

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.23)
    GThread :                    YES (ver 2.40.2)
    GtkGlExt:                    NO
    OpenGL support:              NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.4)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   
      base:                      YES (ver 0.10.36)
      video:                     YES (ver 0.10.36)
      app:                       YES (ver 0.10.36)
      riff:                      YES (ver 0.10.36)
      pbutils:                   YES (ver 0.10.36)
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l1 (ver 1.0.1) / libv4l2 (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     NO
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Include path:                /home/gfolego/packages/opencv-2.4.11/3rdparty/include/opencl/1.2
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/local/lib/python2.7/dist-packages/numpy/core/include (ver 1.9.2)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  YES

  Documentation:
    Build Documentation:         NO
    Sphinx:                      NO
    PdfLaTeX compiler:           /usr/bin/pdflatex
    Doxygen:                     YES (/usr/bin/doxygen)

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  /home/gfolego/packages/opencv-2.4.11/release/installed

  cvconfig.h is in:              /home/gfolego/packages/opencv-2.4.11/release
-----------------------------------------------------------------


==18997== 
==18997== HEAP SUMMARY:
==18997==     in use at exit: 0 bytes in 0 blocks
==18997==   total heap usage: 27 allocs, 27 frees, 10,961 bytes allocated
==18997== 
==18997== All heap blocks were freed -- no leaks are possible
==18997== 
==18997== For counts of detected and suppressed errors, rerun with: -v
==18997== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

Now, building OpenCV with TBB support:

$ cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=<opencv_install_path> -D WITH_TBB=ON ..
$ make -j9
$ make -j9 install

Building the sample with the new library:

$ g++ -Wall -Wextra -Werror -Weffc++ -ansi -pedantic -O2 test.cpp -o test -I/home/gfolego/packages/opencv-2.4.11/release/installed/include/opencv /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so
-I<opencv_install_path>/include/opencv <opencv_install_path>/lib/libopencv_core.so <opencv_install_path>/lib/libopencv_imgproc.so

And the new output:

$ LD_LIBRARY_PATH=/home/gfolego/packages/opencv-2.4.11/release/installed/lib/:$LD_LIBRARY_PATH valgrind --leak-check=full ./test 
==31226== Memcheck, a memory error detector
==31226== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==31226== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==31226== Command: ./test
==31226== 

General configuration for OpenCV 2.4.11 =====================================
  Version control:               unknown

  Platform:
    Host:                        Linux 3.16.0-34-generic x86_64
    CMake:                       2.8.12.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               RELEASE

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                /usr/bin/c++  (ver 4.8.4)
    C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/cc
    C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -msse3 -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      
    Linker flags (Debug):        
    Precompiled headers:         YES

  OpenCV modules:
    To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib java python stitching superres ts videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 androidcamera dynamicuda viz

  GUI: 
    QT:                          NO
    GTK+ 2.x:                    YES (ver 2.24.23)
    GThread :                    YES (ver 2.40.2)
    GtkGlExt:                    NO
    OpenGL support:              NO
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
    JPEG:                        /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
    PNG:                         /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.2.50)
    TIFF:                        /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.3)
    JPEG 2000:                   /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
    OpenEXR:                     /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 1.6.1)

  Video I/O:
    DC1394 1.x:                  NO
    DC1394 2.x:                  YES (ver 2.2.1)
    FFMPEG:                      YES
      codec:                     YES (ver 54.35.0)
      format:                    YES (ver 54.20.4)
      util:                      YES (ver 52.3.0)
      swscale:                   YES (ver 2.1.1)
      gentoo-style:              YES
    GStreamer:                   
      base:                      YES (ver 0.10.36)
      video:                     YES (ver 0.10.36)
      app:                       YES (ver 0.10.36)
      riff:                      YES (ver 0.10.36)
      pbutils:                   YES (ver 0.10.36)
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    UniCap:                      NO
    UniCap ucil:                 NO
    V4L/V4L2:                    Using libv4l1 (ver 1.0.1) / libv4l2 (ver 1.0.1)
    XIMEA:                       NO
    Xine:                        NO

  Other third-party libraries:
    Use IPP:                     NO
    Use Eigen:                   YES (ver 3.2.0)
    Use TBB:                     YES (ver 4.2 interface 7000)
    Use OpenMP:                  NO
    Use GCD                      NO
    Use Concurrency              NO
    Use C=:                      NO
    Use Cuda:                    NO
    Use OpenCL:                  YES

  OpenCL:
    Version:                     dynamic
    Include path:                /home/gfolego/packages/opencv-2.4.11/3rdparty/include/opencl/1.2
    Use AMD FFT:                 NO
    Use AMD BLAS:                NO

  Python:
    Interpreter:                 /usr/bin/python2 (ver 2.7.6)
    Libraries:                   /usr/lib/x86_64-linux-gnu/libpython2.7.so (ver 2.7.6)
    numpy:                       /usr/local/lib/python2.7/dist-packages/numpy/core/include (ver 1.9.2)
    packages path:               lib/python2.7/dist-packages

  Java:
    ant:                         /usr/bin/ant (ver 1.9.3)
    JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
    Java tests:                  YES

  Documentation:
    Build Documentation:         NO
    Sphinx:                      NO
    PdfLaTeX compiler:           /usr/bin/pdflatex
    Doxygen:                     YES (/usr/bin/doxygen)

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  /home/gfolego/packages/opencv-2.4.11/release/installed

  cvconfig.h is in:              /home/gfolego/packages/opencv-2.4.11/release
-----------------------------------------------------------------


==31226== 
==31226== HEAP SUMMARY:
==31226==     in use at exit: 24,160 bytes in 60 blocks
==31226==   total heap usage: 92 allocs, 32 frees, 36,209 bytes allocated
==31226== 
==31226== 192 bytes in 1 blocks are possibly lost in loss record 1 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x6716339: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719175: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671987D: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719994: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719AE4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 2 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719971: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719AE4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 3 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B3F8: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 4 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BD97: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BEF4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671D720: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671C811: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719361: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 5 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BD97: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717786: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 384 bytes in 1 blocks are possibly lost in loss record 6 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671BD97: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671CF12: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77D50: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 520 bytes in 1 blocks are possibly lost in loss record 7 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671D70A: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671C811: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719361: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 1,024 bytes in 1 blocks are possibly lost in loss record 8 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x6715CC1: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671634C: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719175: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671987D: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719994: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719AE4: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226== 
==31226== 1,536 bytes in 24 blocks are possibly lost in loss record 9 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x6711BC9: tbb::internal::allocate_via_handler_v3(unsigned long) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B2CB: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 3,096 bytes in 3 blocks are possibly lost in loss record 10 of 12
==31226==    at 0x4C2B800: operator new[](unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671B23B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 3,584 bytes in 1 blocks are possibly lost in loss record 11 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x671195B: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6711B70: tbb::internal::NFS_Allocate(unsigned long, unsigned long, void*) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B594: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== 12,288 bytes in 24 blocks are possibly lost in loss record 12 of 12
==31226==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==31226==    by 0x6711BC9: tbb::internal::allocate_via_handler_v3(unsigned long) (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B2EC: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x671B5BD: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719B02: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6719359: ??? (in /usr/lib/libtbb.so.2)
==31226==    by 0x6717800: tbb::internal::allocate_root_with_context_proxy::allocate(unsigned long) const (in /usr/lib/libtbb.so.2)
==31226==    by 0x4F77CF9: cv::parallel_for_(cv::Range const&, cv::ParallelLoopBody const&, double) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_core.so.2.4.11)
==31226==    by 0x54A6B94: void cv::CvtColorLoop<cv::RGB2Gray<unsigned char> >(cv::Mat const&, cv::Mat&, cv::RGB2Gray<unsigned char> const&) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x54B846D: cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int) (in /home/gfolego/packages/opencv-2.4.11/release/installed/lib/libopencv_imgproc.so.2.4.11)
==31226==    by 0x400E78: main (in /home/gfolego/projects/test/test)
==31226== 
==31226== LEAK SUMMARY:
==31226==    definitely lost: 0 bytes in 0 blocks
==31226==    indirectly lost: 0 bytes in 0 blocks
==31226==      possibly lost: 24,160 bytes in 60 blocks
==31226==    still reachable: 0 bytes in 0 blocks
==31226==         suppressed: 0 bytes in 0 blocks
==31226== 
==31226== For counts of detected and suppressed errors, rerun with: -v
==31226== ERROR SUMMARY: 12 errors from 12 contexts (suppressed: 0 from 0)