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OpenCV 3.2.0 cannnot access to SURF/SIFT in xfeatures2d

asked 2017-09-16 13:41:17 -0500

breadbugs gravatar image

updated 2017-09-16 14:25:35 -0500

I am using Qt creator in Ubuntu 16.04 to build a non-Qt project. I need to use SIFT to detect features. I know that SIFT and SURF are in OpenCV_contrib so I add the extra module when using CMake-gui to configure OpenCV.

Then I can find libopencv_xfeatures2d.so/.so.3.2/.so.3.2.0 and also libopencv_features2d.so/.so.3.2/.so.3.2.0 in /usr/local/lib When I am using the code from OpenCV official website: test code to test SIFT, I still get the error

/home/ronjane92/Documents/Qt/OpenCV/build/lib/libslam_essentials.so:-1: error: undefined reference to `cv::xfeatures2d::SIFT::create(int, int, double, double, double)'

:-1: error: collect2: error: ld returned 1 exit status

My CMakeLists.txt has the following things:

    CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
    PROJECT(opencv_test)

    include( CheckCXXCompilerFlag )
    SET(CMAKE_CXX_FLAGS "-std=c++11 ${CMAKE_CXX_FLAGS}")

    FIND_PACKAGE( PCL 1.7 REQUIRED COMPONENTS common io visualization)
    ADD_DEFINITIONS( ${PCL_DEFINITIONS} )
    INCLUDE_DIRECTORIES( ${PCL_INCLUDE_DIRS} )
    LINK_DIRECTORIES( ${PCL_LIBRARY_DIRS} )

    ADD_SUBDIRECTORY(lib)
    INCLUDE_DIRECTORIES( ${PROJECT_SOURCE_DIR}/lib )
    LINK_DIRECTORIES( ${PROJECT_BINARY_DIR}/lib )

    FIND_PACKAGE( OpenCV 3.1.0 REQUIRED )
    INCLUDE_DIRECTORIES( ${OpenCV_INCLUDE_DIRS} )

    ADD_EXECUTABLE(${PROJECT_NAME} "main.cpp")
    TARGET_LINK_LIBRARIES(opencv_test ${OpenCV_LIBRARIES}
                                      ${PCL_LIBRARIES}
                                      realsense
                                      slam_essentials
                         )

The results from Cmake-gui are
Detected version of GNU GCC: 54 (504)
FP16: Feature disabled
Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found suitable version "1.2.8", minimum required is "1.2.3") 
Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.8") 
Found OpenEXR: /usr/lib/x86_64-linux-gnu/libIlmImf.so
Checking for module 'gstreamer-base-1.0'
  No package 'gstreamer-base-1.0' found
Checking for module 'gstreamer-video-1.0'
  No package 'gstreamer-video-1.0' found
Checking for module 'gstreamer-app-1.0'
  No package 'gstreamer-app-1.0' found
Checking for module 'gstreamer-riff-1.0'
  No package 'gstreamer-riff-1.0' found
Checking for module 'gstreamer-pbutils-1.0'
  No package 'gstreamer-pbutils-1.0' found
Checking for module 'gstreamer-base-0.10'
  No package 'gstreamer-base-0.10' found
Checking for module 'gstreamer-video-0.10'
  No package 'gstreamer-video-0.10' found
Checking for module 'gstreamer-app-0.10'
  No package 'gstreamer-app-0.10' found
Checking for module 'gstreamer-riff-0.10'
  No package 'gstreamer-riff-0.10' found
Checking for module 'gstreamer-pbutils-0.10'
  No package 'gstreamer-pbutils-0.10' found
Looking for linux/videodev.h
Looking for linux/videodev.h - not found
Looking for linux/videodev2.h
Looking for linux/videodev2.h - found
Looking for sys/videoio.h
Looking for sys/videoio.h - not found
WARNING, PrimeSensor Module binaries directory (set by OPENNI_PRIME_SENSOR_MODULE_BIN_DIR variable) is not found or does not have PrimeSensor Module binaries.
Checking for module 'libavresample'
  No package 'libavresample' found
Checking for module 'libgphoto2'
  No package 'libgphoto2' found
Found TBB: /usr/lib/x86_64-linux-gnu/libtbb.so
found IPP (ICV version): 9.0.1 [9.0.1]
at: /home/ronjane92/Programs/opencv/opencv-3.2.0-build/3rdparty/ippicv/ippicv_lnx
Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
Could NOT find Atlas (missing:  Atlas_CLAPACK_INCLUDE_DIR) 
Could NOT find JNI (missing:  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) 
The imported target "vtkRenderingPythonTkWidgets" references the file
   "/usr/lib/x86_64-linux-gnu/libvtkRenderingPythonTkWidgets.so"
but this file does not exist.  Possible reasons include:
* The file was deleted, renamed, or moved to ...
(more)
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Comments

well, your cmake output clearly shows, that the opencv_xfeatures2d module was build (but again, please check !)

problem now seems to be, why the cmake file to build your program does not pick it up, right ?

berak gravatar imageberak ( 2017-09-16 14:02:40 -0500 )edit

btw: "I am using Qt creator in Ubuntu 16.04 to build a non-Qt project." -- totally irrelevant, and more an obstacle. keep it plain and simple.

berak gravatar imageberak ( 2017-09-16 14:06:33 -0500 )edit

Thanks for your reply.

Can the libopencv_xfeatures2d.so file in /usr/local/lib be an evidence that the opencv_xfeatures2d module was already built? If yes, then I can say it was already built. I do not know what is another way to prove that it was built.

Yes, I think the problem is why my CMake cannot detect the libs.

breadbugs gravatar imagebreadbugs ( 2017-09-16 14:08:25 -0500 )edit

"Can the libopencv_xfeatures2d.so file in /usr/local/lib be an evidence that the opencv_xfeatures2d module was already built" -- yes. (well, unless you have to fear confusion with a previously build opencv version)

again, i'd say, something in the cmake file to build your program is wrong.

berak gravatar imageberak ( 2017-09-16 14:12:38 -0500 )edit

Can I just delete all the OpenCV-related lib files in /usr/local/lib and rebuild the whole OpenCV packages again? I am just worried that if I could delete them thoroughly? Actually, I just rebuild them all a few hours ago but I did not do the deletion step.

breadbugs gravatar imagebreadbugs ( 2017-09-16 14:18:06 -0500 )edit

imho, you need not fear, the current version should just overwrite the previous.

(and i may be wrong, but i think, you're working on the wrong problem. if it was build originally, it's ok.)

can you ditch cmake for your own project ( yea, it looks complicated, pcl and all), and try to write a simple (hahaha) makefile on your own ?

berak gravatar imageberak ( 2017-09-16 14:24:47 -0500 )edit

Thanks for the advice. Let me simplify it.

breadbugs gravatar imagebreadbugs ( 2017-09-16 14:32:08 -0500 )edit

Thanks guy! Acutally, I met this problem a year ago but then I had to do something else. I almost forgot this problem until last night when I started to do the same thing as the last year. Fortunately, you helped me out. New user can only answer 2 days later... I'll do that afterwards.

breadbugs gravatar imagebreadbugs ( 2017-09-16 15:22:38 -0500 )edit

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answered 2017-09-25 20:25:00 -0500

breadbugs gravatar image

Problem solved. I defined some functions and those functions need to link to OpenCV libraries. However, I just add FIND_PACKAGE and INCLUDE_DIRECTORIES to OpenCV in the CMakeLists.txt in the source directory but in that in the directory where the headers and sources are placed. Everything goes fine after adding to the lib directory.

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Asked: 2017-09-16 13:41:17 -0500

Seen: 2,091 times

Last updated: Sep 25 '17