centos opencv + python

opencv + python 配置

Table of Contents

• 1. Installing OpenCV from source
• 1.1. We need CMake to configure the installation, GCC for compilation, Python-devel and Numpy for creating Python extensions etc.
• 1.2. Next we need GTK support for GUI features, Camera support (libdc1394, libv4l), Media Support (ffmpeg, gstreamer)
• 1.3. OpenCV comes with supporting files for image formats like PNG, JPEG, JPEG2000, TIFF, WebP etc. But it may be a little old. If you want to get latest libraries, you can install development files for these formats.
• 1.4. install OpenCV
• 1.5. test.py

1 Installing OpenCV from source

1.1 We need CMake to configure the installation, GCC for compilation, Python-devel and Numpy for creating Python extensions etc.

yum install cmake
yum install python-devel numpy
yum install gcc gcc-c++

1.2 Next we need GTK support for GUI features, Camera support (libdc1394, libv4l), Media Support (ffmpeg, gstreamer)

yum install gtk2-devel
yum install libdc1394-devel
yum install libv4l-devel
yum install ffmpeg-devel
yum install gstreamer-plugins-base-devel

1.3 OpenCV comes with supporting files for image formats like PNG, JPEG, JPEG2000, TIFF, WebP etc. But it may be a little old. If you want to get latest libraries, you can install development files for these formats.

yum install libpng-devel
yum install libjpeg-turbo-devel
yum install jasper-devel
yum install openexr-devel
yum install libtiff-devel
yum install libwebp-devel

1.4 install OpenCV

• yum install opencv
• yum install opencv-python
• yum install opencv-devel (opencv 开发包，含有头文件, for c++)

1.5 test.py

import cv2
import numpy as np

img = np.zeros((512, 512, 3), np.uint8)
cv2.line(img, (0,0), (511, 511), (255, 0, 0), 5)
cv2.imshow('img',img)
cv2.waitKey(1000)
cv2.destroyAllWindows()