POWER-OpenCV: Open Source Computer Vision Library Optimized for IBM Power Architecture

Resources

• Homepage: http://opencv.org
• Docs: http://docs.opencv.org/master/
• Q&A forum: http://answers.opencv.org
• Issue tracking: https://github.com/opencv/opencv/issues

Contributing

• Please read before starting work on a pull request: https://github.com/opencv/opencv/wiki/How_to_contribute
• Build and other information, see: https://github.com/IBM/opencv-power/wiki

Summary of guidelines:

• One pull request per issue;
• Choose the right base branch;
• Include tests and documentation;
• Clean up "oops" commits before submitting;
• Follow the coding style guide.

Compile and install

$ cd opencv
$ mkdir build
$ cd build
$ cmake -DWITH_JPEG=ON -DWITH_OPENCL=OFF \
-DWITH_OPENMP=ON -DWITH_PTHREADS_PF=OFF \
-DCMAKE_C_FLAGS="-mcpu=power9 -mtune=power9" -DCMAKE_CXX_FLAGS="-mcpu=power9 -mtune=power9" \
-DCMAKE_VERBOSE_MAKEFILE=ON \
-DCMAKE_C_COMPILER=/opt/at11.0/bin/gcc -DCMAKE_CXX_COMPILER=/opt/at11.0/bin/g++ \
$ make -j20
$ make install

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a possible compile options for python3 libs

cmake -DWITH_JPEG=ON -DWITH_OPENCL=OFF \
-DWITH_OPENMP=OFF -DWITH_PTHREADS_PF=OFF \
-DWITH_CUDA=OFF \
-DCMAKE_C_FLAGS="-mcpu=power9 -mtune=power9" -DCMAKE_CXX_FLAGS="-mcpu=power9 -mtune=power9" \
-DCMAKE_VERBOSE_MAKEFILE=ON \
-DCMAKE_C_COMPILER=$(which gcc) -DCMAKE_CXX_COMPILER=$(which g++) \
-DPYTHON3_EXECUTABLE=$(which python3) \
-DPYTHON3_INCLUDE_DIR=$(python3 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())") \
-DPYTHON3_LIBRARY=$(python3 -c "from distutils.sysconfig import get_config_var;from os.path import dirname,join ; print(join(dirname(get_config_var('LIBPC')),get_config_var('LDLIBRARY')))") \
-DPYTHON3_NUMPY_INCLUDE_DIRS=$(python3 -c "import numpy; print(numpy.get_include())") \
-DPYTHON3_PACKAGES_PATH=$(python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())") \

• The example compilation guide is using AT which is bind to Python3. Use other compilers for python2.
• You could specify the compiler as your default GCC/G++;
• It is highly recommend to turn OpenMP on for performance consideration, and it is better to set the environment OMP_PROC_BIND=true and proper OMP_NUM_THREADS for affinity;
• If you are compiling the code on a POWER8 machine, please replace the cmake c/c++ flags as power8.