opencv3.1+opencv_contrib 編譯出錯筆記

在編譯時遇到了vtk的問題。我之前自己下載了最新的vtk7，自己編譯安裝了。裏面有一個選項和之前的選項不同，默認是opengl2，然後opencv在關聯vtk時查找的時vtk裏面的opengl，並不是opengl2，因此需要修改opencv的一個cmake文件。
參考網址這裏

wget https://github.com/Itseez/opencv/archive/3.1.0.zip
wget https://github.com/Itseez/opencv_contrib/archive/3.1.0.zip
unzip 3.1.0.zip
unzip 3.1.0.zip.1
cd opencv-3.1.0
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=/usr/local \
      -D BUILD_opencv_java=OFF \
      -D WITH_IPP=OFF -D WITH_1394=OFF \
      -D WITH_FFMPEG=OFF \
      -D BUILD_EXAMPLES=OFF \
      -D BUILD_TESTS=OFF \
      -D BUILD_PERF_TESTS=OFF \
      -D BUILD_DOCS=OFF \
      -D BUILD_opencv_python2=ON \
      -D BUILD_opencv_python3=ON \
      -D BUILD_opencv_video=OFF \
      -D BUILD_opencv_videoio=OFF \
      -D BUILD_opencv_videostab=OFF \
      -D PYTHON_EXECUTABLE=$(which python) \
      -D OPENCV_EXTRA_MODULES_PATH=/Users/mona/computer_vision/Face_Recognition/opencv_contrib-3.1.0/modules ..

  In the last one make sure to have the absolute path not something like -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/opencv_contrib-3.1.0/modules ..

Also you would need vi cmake/OpenCVDetectVTK.cmake and change line 6 so it has vtkRenderingOpenGL2 instead of vtkRenderingOpenGL:

find_package(VTK QUIET COMPONENTS vtkRenderingOpenGL2 vtkInteractionStyle vtkRenderingLOD vtkIOPLY vtkFiltersTexture vtkRenderingFreeType vtkIOExport NO_MODULE)