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After I compile opencv_contrib to opencv3.1,I still can't use SURF

Below is my cmake options:

cmake -D WITH_TBB=ON -D WITH_EIGEN=ON -D BUILD_DOCS=ON -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D WITH_OPENCL=OFF -D WITH_CUDA=OFF -D BUILD_opencv_gpu=OFF -D BUILD_opencv_gpuarithm=OFF -D BUILD_opencv_gpubgsegm=OFF -D BUILD_opencv_gpucodec=OFF -D BUILD_opencv_gpufeatures2d=OFF -D BUILD_opencv_gpufilters=OFF -D BUILD_opencv_gpuimgproc=OFF -D BUILD_opencv_gpulegacy=OFF -D BUILD_opencv_gpuoptflow=OFF -D BUILD_opencv_gpustereo=OFF -D BUILD_opencv_gpuwarping=OFF -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D PYTHON_DEFAULT_EXECUTABLE=/usr/local/bin/python -D PYTHON_EXECUTABLE=/usr/local/bin/python -D PYTHON_INCLUDE_DIRS=/usr/local/include/python3.5m -D PYTHON_LIBRARY=/usr/local/lib/libpython3.5m.so ../../opencv-3.1.0

I just type:

import cv2
cv2.xfeatures2d.SURF_create(400)

then a error happened:

Traceback (most recent call last): File "", line 1, in AttributeError: module 'cv2' has no attribute 'xfeatures2d'

What are the possile reasons lead to this problem?s problem?e the possile reasons lead to this problem?

After I compile opencv_contrib to opencv3.1,I still can't use SURF

Below is my cmake options:

cmake -D WITH_TBB=ON -D WITH_EIGEN=ON -D BUILD_DOCS=ON -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D WITH_OPENCL=OFF -D WITH_CUDA=OFF -D BUILD_opencv_gpu=OFF -D BUILD_opencv_gpuarithm=OFF -D BUILD_opencv_gpubgsegm=OFF -D BUILD_opencv_gpucodec=OFF -D BUILD_opencv_gpufeatures2d=OFF -D BUILD_opencv_gpufilters=OFF -D BUILD_opencv_gpuimgproc=OFF -D BUILD_opencv_gpulegacy=OFF -D BUILD_opencv_gpuoptflow=OFF -D BUILD_opencv_gpustereo=OFF -D BUILD_opencv_gpuwarping=OFF -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D PYTHON_DEFAULT_EXECUTABLE=/usr/local/bin/python -D PYTHON_EXECUTABLE=/usr/local/bin/python -D PYTHON_INCLUDE_DIRS=/usr/local/include/python3.5m -D PYTHON_LIBRARY=/usr/local/lib/libpython3.5m.so ../../opencv-3.1.0

and cmake output:

-- Detected version of GNU GCC: 44 (404) -- Found ZLIB: /usr/lib64/libz.so (found suitable version "1.2.3", minimum required is "1.2.3") -- Could NOT find Jasper (missing: JASPER_LIBRARIES JASPER_INCLUDE_DIR) -- Found ZLIB: /usr/lib64/libz.so (found version "1.2.3") -- checking for module 'gtk+-3.0' -- package 'gtk+-3.0' not found -- checking for module 'gtk+-2.0' -- package 'gtk+-2.0' not found -- checking for module 'gthread-2.0' -- package 'gthread-2.0' not found -- checking for module 'gstreamer-base-1.0' -- package 'gstreamer-base-1.0' not found -- checking for module 'gstreamer-video-1.0' -- package 'gstreamer-video-1.0' not found -- checking for module 'gstreamer-app-1.0' -- package 'gstreamer-app-1.0' not found -- checking for module 'gstreamer-riff-1.0' -- package 'gstreamer-riff-1.0' not found -- checking for module 'gstreamer-pbutils-1.0' -- package 'gstreamer-pbutils-1.0' not found -- checking for module 'gstreamer-base-0.10' -- package 'gstreamer-base-0.10' not found -- checking for module 'gstreamer-video-0.10' -- package 'gstreamer-video-0.10' not found -- checking for module 'gstreamer-app-0.10' -- package 'gstreamer-app-0.10' not found -- checking for module 'gstreamer-riff-0.10' -- package 'gstreamer-riff-0.10' not found -- checking for module 'gstreamer-pbutils-0.10' -- package 'gstreamer-pbutils-0.10' not found -- checking for module 'libdc1394-2' -- package 'libdc1394-2' not found -- checking for module 'libdc1394' -- package 'libdc1394' not found -- checking for module 'libv4l1' -- package 'libv4l1' not found -- checking for module 'libv4l2' -- package 'libv4l2' not found -- Looking for linux/videodev.h -- Looking for linux/videodev.h - found -- Looking for linux/videodev2.h -- Looking for linux/videodev2.h - found -- Looking for sys/videoio.h -- Looking for sys/videoio.h - not found -- checking for module 'libavcodec' -- package 'libavcodec' not found -- checking for module 'libavformat' -- package 'libavformat' not found -- checking for module 'libavutil' -- package 'libavutil' not found -- checking for module 'libswscale' -- package 'libswscale' not found -- checking for module 'libavresample' -- package 'libavresample' not found -- Looking for libavformat/avformat.h -- Looking for libavformat/avformat.h - not found -- Looking for ffmpeg/avformat.h -- Looking for ffmpeg/avformat.h - not found -- checking for module 'libgphoto2' -- package 'libgphoto2' not found -- checking for module 'tbb' -- package 'tbb' not found -- found IPP (ICV version): 9.0.1 [9.0.1] -- at: /data/software/opencv-3.1.0/3rdparty/ippicv/unpack/ippicv_lnx -- To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR=<filepath> option to cmake -- Found PythonInterp: /usr/local/bin/python (found suitable version "3.5.2", minimum required is "2.7") -- Found PythonInterp: /usr/local/bin/python3 (found suitable version "3.5.2", minimum required is "3.4") -- Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) -- Could NOT find Matlab (missing: MATLAB_MEX_SCRIPT MATLAB_INCLUDE_DIRS MATLAB_ROOT_DIR MATLAB_LIBRARIES MATLAB_LIBRARY_DIRS MATLAB_MEXEXT MATLAB_ARCH MATLAB_BIN)

-- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file

-- General configuration for OpenCV 3.1.0 =====================================

-- Version control: unknown

-- Platform: -- Host: Linux 2.6.32-431.el6.x86_64 x86_64 -- CMake: 2.8.12.2 -- CMake generator: Unix Makefiles -- CMake build tool: /usr/bin/gmake

-- Configuration: RELEASE

-- C/C++: -- Built as dynamic libs?: YES -- C++ Compiler: /usr/bin/c++ (ver 4.4.7) -- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG -- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG -- C Compiler: /usr/bin/cc -- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG -- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG -- Linker flags (Release):
-- Linker flags (Debug):
-- Precompiled headers: YES -- Extra dependencies: /usr/lib64/libjpeg.so /usr/lib64/libpng.so /usr/lib64/libz.so /usr/lib64/libtiff.so dl m pthread rt tbb

-- 3rdparty dependencies: libwebp libjasper IlmImf

-- OpenCV modules: -- To be built: core flann imgproc ml photo video imgcodecs shape videoio highgui objdetect superres features2d calib3d stitching videostab python2 python3 -- Disabled: world -- Disabled by dependency: -

-- Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java ts viz

-- GUI: -- QT: NO -- GTK+: NO -- GThread : NO -- GtkGlExt: NO -- OpenGL support: NO

-- VTK support: NO

-- Media I/O: -- ZLib: /usr/lib64/libz.so (ver 1.2.3) -- JPEG: /usr/lib64/libjpeg.so (ver ) -- WEBP: build (ver 0.3.1) -- PNG: /usr/lib64/libpng.so (ver 1.2.49) -- TIFF: /usr/lib64/libtiff.so (ver 42 - 3.9.4) -- JPEG 2000: build (ver 1.900.1) -- OpenEXR: build (ver 1.7.1)

-- GDAL: NO

-- Video I/O: -- DC1394 1.x: NO -- DC1394 2.x: NO -- FFMPEG: NO -- codec: NO -- format: NO -- util: NO -- swscale: NO -- resample: NO -- gentoo-style: NO -- GStreamer: NO -- OpenNI: NO -- OpenNI PrimeSensor Modules: NO -- OpenNI2: NO -- PvAPI: NO -- GigEVisionSDK: NO -- UniCap: NO -- UniCap ucil: NO -- V4L/V4L2: YES/YES -- XIMEA: NO -- Xine: NO

-- gPhoto2: NO

-- Parallel framework: TBB (ver 2.2 interface 4001)

-- Other third-party libraries: -- Use IPP: 9.0.1 [9.0.1] -- at: /data/software/opencv-3.1.0/3rdparty/ippicv/unpack/ippicv_lnx -- Use IPP Async: NO -- Use VA: NO -- Use Intel VA-API/OpenCL: NO -- Use Eigen: YES (ver 3.2.5) -- Use Cuda: NO -- Use OpenCL: NO

-- Use custom HAL: NO

-- Python 2: -- Interpreter: /usr/local/bin/python (ver 3.5.2) -- Libraries: /usr/local/lib/libpython3.5m.so (ver 3.5.2) -- numpy: /usr/local/lib/python3.5/site-packages/numpy/core/include (ver 1.11.2)

-- packages path: lib/python3.5/site-packages

-- Python 3: -- Interpreter: /usr/local/bin/python3 (ver 3.5.2) -- Libraries: /usr/local/lib/libpython3.5m.so (ver 3.5.2) -- numpy: /usr/local/lib/python3.5/site-packages/numpy/core/include (ver 1.11.2)

-- packages path: lib/python3.5/site-packages

-- Python (for build): /usr/local/bin/python

-- Java: -- ant: NO -- JNI: NO -- Java wrappers: NO

-- Java tests: NO

-- Matlab: Matlab not found or implicitly disabled

-- Documentation: -- Doxygen: /usr/bin/doxygen (ver 1.6.1)

-- PlantUML: NO

-- Tests and samples: -- Tests: NO -- Performance tests: NO

-- C/C++ Examples: NO

-- Install path: /usr/local

-- cvconfig.h is in: /data/software/OpenCV/build

-- -----------------------------------------------------------------

-- Configuring done -- Generating done -- Build files have been written to: /data/software/OpenCV/build

I just type:

import cv2
cv2.xfeatures2d.SURF_create(400)

then a error happened:

Traceback (most recent call last): File "", line 1, in AttributeError: module 'cv2' has no attribute 'xfeatures2d'

What are the possile reasons lead to this problem?s problem?e the possile reasons lead to this problem?

click to hide/show revision 3
No.3 Revision

updated 2016-12-02 04:50:29 -0600

berak gravatar image

After I compile opencv_contrib to opencv3.1,I still can't use SURF

Below is my cmake options:

cmake -D WITH_TBB=ON -D WITH_EIGEN=ON -D BUILD_DOCS=ON -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D WITH_OPENCL=OFF -D WITH_CUDA=OFF -D BUILD_opencv_gpu=OFF -D BUILD_opencv_gpuarithm=OFF -D BUILD_opencv_gpubgsegm=OFF -D BUILD_opencv_gpucodec=OFF -D BUILD_opencv_gpufeatures2d=OFF -D BUILD_opencv_gpufilters=OFF -D BUILD_opencv_gpuimgproc=OFF -D BUILD_opencv_gpulegacy=OFF -D BUILD_opencv_gpuoptflow=OFF -D BUILD_opencv_gpustereo=OFF -D BUILD_opencv_gpuwarping=OFF -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D PYTHON_DEFAULT_EXECUTABLE=/usr/local/bin/python -D PYTHON_EXECUTABLE=/usr/local/bin/python -D PYTHON_INCLUDE_DIRS=/usr/local/include/python3.5m -D PYTHON_LIBRARY=/usr/local/lib/libpython3.5m.so ../../opencv-3.1.0

and cmake output:

-- Detected version of GNU GCC: 44 (404)
-- Found ZLIB: /usr/lib64/libz.so (found suitable version "1.2.3", minimum required is "1.2.3") 
-- Could NOT find Jasper (missing:  JASPER_LIBRARIES JASPER_INCLUDE_DIR) 
-- Found ZLIB: /usr/lib64/libz.so (found version "1.2.3") 
-- checking for module 'gtk+-3.0'
--   package 'gtk+-3.0' not found
-- checking for module 'gtk+-2.0'
--   package 'gtk+-2.0' not found
-- checking for module 'gthread-2.0'
--   package 'gthread-2.0' not found
-- checking for module 'gstreamer-base-1.0'
--   package 'gstreamer-base-1.0' not found
-- checking for module 'gstreamer-video-1.0'
--   package 'gstreamer-video-1.0' not found
-- checking for module 'gstreamer-app-1.0'
--   package 'gstreamer-app-1.0' not found
-- checking for module 'gstreamer-riff-1.0'
--   package 'gstreamer-riff-1.0' not found
-- checking for module 'gstreamer-pbutils-1.0'
--   package 'gstreamer-pbutils-1.0' not found
-- checking for module 'gstreamer-base-0.10'
--   package 'gstreamer-base-0.10' not found
-- checking for module 'gstreamer-video-0.10'
--   package 'gstreamer-video-0.10' not found
-- checking for module 'gstreamer-app-0.10'
--   package 'gstreamer-app-0.10' not found
-- checking for module 'gstreamer-riff-0.10'
--   package 'gstreamer-riff-0.10' not found
-- checking for module 'gstreamer-pbutils-0.10'
--   package 'gstreamer-pbutils-0.10' not found
-- checking for module 'libdc1394-2'
--   package 'libdc1394-2' not found
-- checking for module 'libdc1394'
--   package 'libdc1394' not found
-- checking for module 'libv4l1'
--   package 'libv4l1' not found
-- checking for module 'libv4l2'
--   package 'libv4l2' not found
-- Looking for linux/videodev.h
-- Looking for linux/videodev.h - found
-- Looking for linux/videodev2.h
-- Looking for linux/videodev2.h - found
-- Looking for sys/videoio.h
-- Looking for sys/videoio.h - not found
-- checking for module 'libavcodec'
--   package 'libavcodec' not found
-- checking for module 'libavformat'
--   package 'libavformat' not found
-- checking for module 'libavutil'
--   package 'libavutil' not found
-- checking for module 'libswscale'
--   package 'libswscale' not found
-- checking for module 'libavresample'
--   package 'libavresample' not found
-- Looking for libavformat/avformat.h
-- Looking for libavformat/avformat.h - not found
-- Looking for ffmpeg/avformat.h
-- Looking for ffmpeg/avformat.h - not found
-- checking for module 'libgphoto2'
--   package 'libgphoto2' not found
-- checking for module 'tbb'
--   package 'tbb' not found
-- found IPP (ICV version): 9.0.1 [9.0.1]
-- at: /data/software/opencv-3.1.0/3rdparty/ippicv/unpack/ippicv_lnx
-- To enable PlantUML support, set PLANTUML_JAR environment variable or pass -DPLANTUML_JAR=<filepath> option to cmake
-- Found PythonInterp: /usr/local/bin/python (found suitable version "3.5.2", minimum required is "2.7") 
-- Found PythonInterp: /usr/local/bin/python3 (found suitable version "3.5.2", minimum required is "3.4") 
-- Could NOT find JNI (missing:  JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH) 
-- Could NOT find Matlab (missing:  MATLAB_MEX_SCRIPT MATLAB_INCLUDE_DIRS MATLAB_ROOT_DIR MATLAB_LIBRARIES MATLAB_LIBRARY_DIRS MATLAB_MEXEXT MATLAB_ARCH MATLAB_BIN) 

-- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file

file -- -- General configuration for OpenCV 3.1.0 =====================================

===================================== -- Version control: unknown

unknown -- -- Platform: -- Host: Linux 2.6.32-431.el6.x86_64 x86_64 -- CMake: 2.8.12.2 -- CMake generator: Unix Makefiles -- CMake build tool: /usr/bin/gmake

/usr/bin/gmake -- Configuration: RELEASE

RELEASE -- -- C/C++: -- Built as dynamic libs?: YES -- C++ Compiler: /usr/bin/c++ (ver 4.4.7) -- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG -- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG -- C Compiler: /usr/bin/cc -- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG -- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG -- Linker flags (Release):
-- Linker flags (Debug):
-- Precompiled headers: YES -- Extra dependencies: /usr/lib64/libjpeg.so /usr/lib64/libpng.so /usr/lib64/libz.so /usr/lib64/libtiff.so dl m pthread rt tbb

tbb -- 3rdparty dependencies: libwebp libjasper IlmImf

IlmImf -- -- OpenCV modules: -- To be built: core flann imgproc ml photo video imgcodecs shape videoio highgui objdetect superres features2d calib3d stitching videostab python2 python3 -- Disabled: world -- Disabled by dependency: -

- -- Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java ts viz

viz -- -- GUI: -- QT: NO -- GTK+: NO -- GThread : NO -- GtkGlExt: NO -- OpenGL support: NO

NO -- VTK support: NO

NO -- -- Media I/O: -- ZLib: /usr/lib64/libz.so (ver 1.2.3) -- JPEG: /usr/lib64/libjpeg.so (ver ) -- WEBP: build (ver 0.3.1) -- PNG: /usr/lib64/libpng.so (ver 1.2.49) -- TIFF: /usr/lib64/libtiff.so (ver 42 - 3.9.4) -- JPEG 2000: build (ver 1.900.1) -- OpenEXR: build (ver 1.7.1)

1.7.1) -- GDAL: NO

NO -- -- Video I/O: -- DC1394 1.x: NO -- DC1394 2.x: NO -- FFMPEG: NO -- codec: NO -- format: NO -- util: NO -- swscale: NO -- resample: NO -- gentoo-style: NO -- GStreamer: NO -- OpenNI: NO -- OpenNI PrimeSensor Modules: NO -- OpenNI2: NO -- PvAPI: NO -- GigEVisionSDK: NO -- UniCap: NO -- UniCap ucil: NO -- V4L/V4L2: YES/YES -- XIMEA: NO -- Xine: NO

NO -- gPhoto2: NO

NO -- -- Parallel framework: TBB (ver 2.2 interface 4001)

4001) -- -- Other third-party libraries: -- Use IPP: 9.0.1 [9.0.1] -- at: /data/software/opencv-3.1.0/3rdparty/ippicv/unpack/ippicv_lnx -- Use IPP Async: NO -- Use VA: NO -- Use Intel VA-API/OpenCL: NO -- Use Eigen: YES (ver 3.2.5) -- Use Cuda: NO -- Use OpenCL: NO

NO -- Use custom HAL: NO

NO -- -- Python 2: -- Interpreter: /usr/local/bin/python (ver 3.5.2) -- Libraries: /usr/local/lib/libpython3.5m.so (ver 3.5.2) -- numpy: /usr/local/lib/python3.5/site-packages/numpy/core/include (ver 1.11.2)

1.11.2) -- packages path: lib/python3.5/site-packages

lib/python3.5/site-packages -- -- Python 3: -- Interpreter: /usr/local/bin/python3 (ver 3.5.2) -- Libraries: /usr/local/lib/libpython3.5m.so (ver 3.5.2) -- numpy: /usr/local/lib/python3.5/site-packages/numpy/core/include (ver 1.11.2)

1.11.2) -- packages path: lib/python3.5/site-packages

lib/python3.5/site-packages -- -- Python (for build): /usr/local/bin/python

/usr/local/bin/python -- -- Java: -- ant: NO -- JNI: NO -- Java wrappers: NO

NO -- Java tests: NO

NO -- -- Matlab: Matlab not found or implicitly disabled

disabled -- -- Documentation: -- Doxygen: /usr/bin/doxygen (ver 1.6.1)

1.6.1) -- PlantUML: NO

NO -- -- Tests and samples: -- Tests: NO -- Performance tests: NO

NO -- C/C++ Examples: NO

NO -- -- Install path: /usr/local

/usr/local -- -- cvconfig.h is in: /data/software/OpenCV/build

-- -----------------------------------------------------------------

/data/software/OpenCV/build -- ----------------------------------------------------------------- -- -- Configuring done -- Generating done -- Build files have been written to: /data/software/OpenCV/build

/data/software/OpenCV/build

I just type:

import cv2
cv2.xfeatures2d.SURF_create(400)

then a error happened:

Traceback (most recent call last): File "", line 1, in AttributeError: module 'cv2' has no attribute 'xfeatures2d'

What are the possile reasons lead to this problem?s problem?e the possile reasons lead to this problem?