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All Projects → NeerajGulia → Python Opencv Cuda

NeerajGulia / Python Opencv Cuda

Licence: gpl-3.0
custom opencv_contrib module which exposes opencv cuda optical flow methods with python bindings

Labels

cuda

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python-opencv-cuda

Solution

  1. Create custom opencv_contrib module
  2. Write C++ code to wrap the OpenCV CUDA method
  3. Using OpenCV python bindings, expose your custom method
  4. Build opencv with opencv_contrib
  5. Run python code to test

Steps to create the build

Unzip the source:

  1. opencv source code: https://github.com/opencv/opencv/archive/3.4.2.zip
  2. opencv_contrib source code: https://github.com/opencv/opencv_contrib/archive/3.4.2.zip

Create custom module

  1. Copy the folder named "pythoncuda" (inside c++ folder) to: opencv_contrib/modules

Build opencv using following cmake command

  1. create build directory inside the opencv folder, cd to the build directory
  2. cmake (I used anaconda3 with environment named as: tensorflow_p36 (with python 3.6))
cmake \
-DCMAKE_BUILD_TYPE=RELEASE \
-DWITH_CUDA=ON \
-DCMAKE_INSTALL_PREFIX="/home/$USER/anaconda3/envs/tensorflow_p36" \
-DOPENCV_EXTRA_MODULES_PATH="../../opencv_contrib-3.4.2/modules" \
-DINSTALL_PYTHON_EXAMPLES=OFF \
-DINSTALL_C_EXAMPLES=OFF \
-DBUILD_SHARED_LIBS=OFF \
-DBUILD_DOCS=OFF \
-DBUILD_TESTS=OFF \
-DBUILD_EXAMPLES=OFF \
-DBUILD_PERF_TESTS=OFF \
-DBUILD_opencv_dnn=OFF \
-DTINYDNN_USE_NNPACK=OFF \
-DTINYDNN_USE_TBB=ON \
-DTINYDNN_USE_OMP=ON \
-DENABLE_FAST_MATH=ON \
-DWITH_OPENMP=ON \
-DWITH_TBB=ON \
-DWITH_JPEG=OFF \
-DWITH_IPP=OFF \
-DMKL_WITH_TBB=ON \
-DMKL_WITH_OPENMP=ON \
-DBUILD_opencv_python2=OFF \
-DPYTHON_EXECUTABLE="/home/$USER/anaconda3/envs/tensorflow_p36/bin/python" \
-DPYTHON_LIBRARY="/home/$USER/anaconda3/envs/tensorflow_p36/lib/python3.6" \
-DPYTHON3_LIBRARY="/home/$USER/anaconda3/envs/tensorflow_p36/lib/python3.6" \
-DPYTHON3_EXECUTABLE="/home/$USER/anaconda3/envs/tensorflow_p36/bin/python" \
-DPYTHON3_INCLUDE_DIR="/home/$USER/anaconda3/envs/tensorflow_p36/include/python3.6m" \
-DPYTHON3_INCLUDE_DIR2="/home/$USER/anaconda3/envs/tensorflow_p36/include" \
-DPYTHON3_NUMPY_INCLUDE_DIRS="/home/$USER/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/numpy/core/include" \
-DPYTHON3_INCLUDE_PATH="/home/$USER/anaconda3/envs/tensorflow_p36/include/python3.6m" \
-DPYTHON3_LIBRARIES="/home/$USER/anaconda3/envs/tensorflow_p36/lib/libpython3.6m.so" \
..
  1. make
  2. sudo make install
  3. sudo ldconfig

Test the code

  1. Activate conda environment
  2. Go to folder: python/ and execute the cpu-opt_flow.py and gpu-opt_flow.py python files
python cpu-opt_flow.py
python gpu-opt_flow.py

Output at my end:

total time in optical flow CPU processing: 74.15 sec, for: 794 frames. FPS: 10.71

total time in optical flow GPU processing: 21.98 sec, for: 794 frames. FPS: 36.12

Harware configuration:

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