在mex函數中使用OpenCV：編譯後出錯

我正在開發一個在matlab下開發的項目，但我不得不使用C++和OpenCV。爲了將我的工作與項目集成，我需要使用mex-files。所以我在我的電腦和gcc 4.4上安裝了Matlab 2013。我修改了〜/ .matlab/R2013a/mexopts.sh文件，以便爲opencv設置正確的編譯器和選項。這與MEX MATLAB編譯器的輸出-v在mex函數中使用OpenCV：編譯後出錯

************************************************************************** 
    Warning: Neither -compatibleArrayDims nor -largeArrayDims is selected. 
      Using -compatibleArrayDims. In the future, MATLAB will require 
      the use of -largeArrayDims and remove the -compatibleArrayDims 
      option. For more information, see: 
      http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html 
************************************************************************** 

-> mexopts.sh sourced from directory (DIR = $PREF_DIR) 
    FILE = /home/amine/.matlab/R2013a/mexopts.sh 
---------------------------------------------------------------- 
-> MATLAB    = /usr/local/MATLAB/R2013a 
-> CC     = gcc-4.4 
-> CC flags: 
     CFLAGS    = -std=c99 -D_GNU_SOURCE `pkg-config --cflags opencv` -fexceptions -fPIC -fno-omit-frame-pointer -pthread 
     CDEBUGFLAGS  = -g 
     COPTIMFLAGS  = -O -DNDEBUG 
     CLIBS    = -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++ 
     arguments   = -DMX_COMPAT_32 
-> CXX     = g++-4.4 
-> CXX flags: 
     CXXFLAGS   = -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread 
     CXXDEBUGFLAGS  = -g 
     CXXOPTIMFLAGS  = -O -DNDEBUG 
     CXXLIBS   = -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm 
     arguments   = -DMX_COMPAT_32 
-> FC     = gfortran 
-> FC flags: 
     FFLAGS    = -fexceptions -fbackslash -fPIC -fno-omit-frame-pointer 
     FDEBUGFLAGS  = -g 
     FOPTIMFLAGS  = -O 
     FLIBS    = -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm 
     arguments   = -DMX_COMPAT_32 
-> LD     = g++-4.4 
-> Link flags: 
     LDFLAGS   = -pthread -shared -Wl,--version-script,/usr/local/MATLAB/R2013a/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined /usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_ocl.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_superres.so /usr/local/lib/libopencv_ts.a /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so /usr/lib/x86_64-linux-gnu/libXext.so /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libICE.so /usr/lib/x86_64-linux-gnu/libSM.so /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libGLU.so -ltbb -lrt -lpthread -lm -ldl 
     LDDEBUGFLAGS  = -g 
     LDOPTIMFLAGS  = -O 
     LDEXTENSION  = .mexa64 
     arguments   = 
-> LDCXX     = 
-> Link flags: 
     LDCXXFLAGS   = 
     LDCXXDEBUGFLAGS = 
     LDCXXOPTIMFLAGS = 
     LDCXXEXTENSION  = 
     arguments   = 
---------------------------------------------------------------- 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "mxFunction.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "verifAndHyp.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../Description/Statistic/statistic.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../Description/Statistic/classes.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../Verification/contradiction.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../HypothesisGeneration/hypothesis.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../Description/HoughTransform/hough.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../Description/HoughTransform/utils.cpp" 

-> g++-4.4 -c -I/usr/local/MATLAB/R2013a/extern/include -I/usr/local/MATLAB/R2013a/simulink/include -DMATLAB_MEX_FILE -D_GNU_SOURCE `pkg-config --cflags opencv` -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -O -DNDEBUG "../Verification/distance.cpp" 

-> g++-4.4 -O -pthread -shared -Wl,--version-script,/usr/local/MATLAB/R2013a/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined /usr/local/lib/libopencv_calib3d.so /usr/local/lib/libopencv_contrib.so /usr/local/lib/libopencv_core.so /usr/local/lib/libopencv_features2d.so /usr/local/lib/libopencv_flann.so /usr/local/lib/libopencv_gpu.so /usr/local/lib/libopencv_highgui.so /usr/local/lib/libopencv_imgproc.so /usr/local/lib/libopencv_legacy.so /usr/local/lib/libopencv_ml.so /usr/local/lib/libopencv_nonfree.so /usr/local/lib/libopencv_objdetect.so /usr/local/lib/libopencv_ocl.so /usr/local/lib/libopencv_photo.so /usr/local/lib/libopencv_stitching.so /usr/local/lib/libopencv_superres.so /usr/local/lib/libopencv_ts.a /usr/local/lib/libopencv_video.so /usr/local/lib/libopencv_videostab.so /usr/lib/x86_64-linux-gnu/libXext.so /usr/lib/x86_64-linux-gnu/libX11.so /usr/lib/x86_64-linux-gnu/libICE.so /usr/lib/x86_64-linux-gnu/libSM.so /usr/lib/x86_64-linux-gnu/libGL.so /usr/lib/x86_64-linux-gnu/libGLU.so -ltbb -lrt -lpthread -lm -ldl -o "mxFunction.mexa64" mxFunction.o verifAndHyp.o statistic.o classes.o contradiction.o hypothesis.o hough.o utils.o distance.o -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm

但是當我嘗試使用mxFunction這樣mxFunction（ 'path_to_my_file'），其結果是：

Invalid MEX-file '/home/amine/Stage2A/stage2a/src/HypothesisGeneration/mxFunction.mexa64': /usr/local/lib/libopencv_ocl.so.2.4: undefined symbol: 
_ZTIN2cv16ParallelLoopBodyE

能你有助於解決這個問題？

PS：我使用Ubuntu 14.04和OpenCV 2.4.8

來源

2014-10-11 Amine Chatt

將所有opencv庫（.so文件）複製到包含MEX文件的文件夾中。 – chappjc 2014-10-11 14:55:28

或將包含共享庫的文件夾添加到'PATH'環境變量：'setenv（'PATH'，['/ usr/local/lib'pathsep（）getenv（'PATH'）]）'（或設置並導出在啓動MATLAB之前，從shell中獲得'PATH'） – Amro 2014-10-11 16:10:26

@Amro是不是'LD_LIBRARY_PATH'？我有一段時間沒有使用* nix系統......可能會有所不同。 Ooops http://www.eyrie.org/~eagle/notes/rpath.html – chappjc 2014-10-11 16:33:47

如果你想編譯包含OpenCV的代碼放到一個MEX-文件中的C/C++文件，我強烈建議你使用的mexOpenCV代替mex 。

看一看這個網站正確設置它： http://de.mathworks.com/help/vision/ug/opencv-interface.html?refresh=true

它會告訴你如何安裝visionSupportPackages這是強制性的編譯OpenCV的代碼放到一個MEX文件。

來源

2015-05-19 09:03:43 Nopeman

在mex函數中使用OpenCV：編譯後出錯

回答

相關問題