Firefly-RK3399 上编译安装 OpenCV 3

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OS：官方固件 Xubuntu 16.04

1) Install

1.1) Required Packages

1. # compiler ✓
   
2. $ sudo apt-get install build-essential
   
3. # required ✓
   
4. $ sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
   
5. 
   
6. # optional ✓
   
7. $ sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

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1.2) Getting OpenCV Source Code

1. $ git clone https://github.com/opencv/opencv.git
   
2. $ cd opencv/
   
3. $ git checkout 3.2.0

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If use extra modules:

1. $ git clone https://github.com/opencv/opencv_contrib.git
   
2. $ cd opencv_contrib/
   
3. $ git checkout 3.2.0

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1.3) Building OpenCV from Source

1. $ cd opencv/
   
2. $ mkdir build
   
3. $ cd build/
   
4. 
   
5. $ export PY_NAME=$(python -c 'from sys import version_info as v; print("python%d.%d" % v[:2])')
   
6. $ export PY_NUMPY_DIR=$(python -c 'import os.path, numpy.core; print(os.path.dirname(numpy.core.__file__))')
   
7. 
   
8. $ cmake -DCMAKE_BUILD_TYPE=RELEASE \
   
9. -DCMAKE_INSTALL_PREFIX=/usr/local \
   
10. \
    
11. -DPYTHON2_EXECUTABLE=$(which python) \
    
12. -DPYTHON_INCLUDE_DIR=/usr/include/$PY_NAME \
    
13. -DPYTHON_INCLUDE_DIR2=/usr/include/aarch64-linux-gnu/$PY_NAME \
    
14. -DPYTHON_LIBRARY=/usr/lib/aarch64-linux-gnu/lib$PY_NAME.so \
    
15. -DPYTHON2_NUMPY_INCLUDE_DIRS=/usr/lib/$PY_NAME/dist-packages/numpy/core/include/ \
    
16. \
    
17. -DBUILD_DOCS=OFF \
    
18. -DBUILD_EXAMPLES=OFF \
    
19. -DBUILD_TESTS=OFF \
    
20. -DBUILD_PERF_TESTS=OFF \
    
21. \
    
22. -DOPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
    
23. ..
    
24. 
    
25. $ make -j$(nproc --all)
    
26. $ sudo make install

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2) Examples

2.1) Canny Edge Detection

`canny.py`:

1. #!/usr/bin/env python
   
2. 
   
3. import cv2
   
4. import numpy as np
   
5. 
   
6. def main():
   
7.     img = cv2.imread('../data/messi5.jpg', 0)
   
8.     edges = cv2.Canny(img, 100, 200)
   
9. 
   
10.     cv2.imshow('Original & Edge', np.vstack((img, edges)))
    
11.     cv2.waitKey()
    
12.     cv2.destroyAllWindows()
    
13. 
    
14. if __name__ == '__main__':
    
15.     main()

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3) Appendix

3.1) Install pip

1. $ python --version
   
2. Python 2.7.12
   
3. 
   
4. $ curl -O https://bootstrap.pypa.io/get-pip.py
   
5. $ python get-pip.py
   
6. 
   
7. $ vi ~/.pip/pip.conf
   
8. [global]
   
9. format=columns
   
10. index-url=http://mirrors.aliyun.com/pypi/simple/
    
11. [install]
    
12. trusted-host=mirrors.aliyun.com

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参考：Build OpenCV on Firefly-RK3399