Python opencv库教程

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看看http://blog.csdn.net/llp1992/article/details/50066983

sudo apt-get install libgtk2.0-dev pkg-config

安装opencv
去opencv官网（http://opencv.org/downloads.html）下载linux版本的opencv压缩包，此处下载的opencv3.1版本的。

unzip opencv-3.1.0.zip 
cd ~/ opencv-3.1.0  
mkdir release  
cd release  
cmake -D CMAKE_BUILD_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=/usr/local ..  
make  
sudo make install   

上述编译成功之后，终端部分显示如下：

2.测试opencv

    mkdir ~/opencv-test  
    cd ~/opencv-test  
    gedit DisplayImage.cpp  

//DisplayImage.cpp

    #include   
    #include   
    using namespace cv;  
    int main(int argc, char** argv )  
    {  
        if ( argc != 2 )  
        {  
            printf("usage: DisplayImage.out \n");  
            return -1;  
        }  
        Mat image;  
        image = imread( argv[1], 1 );  
        if ( !image.data )  
        {  
            printf("No image data \n");  
            return -1;  
        }  
        namedWindow("Display Image", WINDOW_AUTOSIZE );  
        imshow("Display Image", image);  
        waitKey(0);  
        return 0;  
    }  

创建CMake编译文件

    gedit CMakeLists.txt  

CMakeLists.txt 内容

    cmake_minimum_required(VERSION 2.8)  
    project( DisplayImage )  
    find_package( OpenCV REQUIRED )  
    add_executable( DisplayImage DisplayImage.cpp )  
    target_link_libraries( DisplayImage ${OpenCV_LIBS} )  

编译

    cd ~/opencv-test  
    cmake .  
    make  

执行

此时opencv-test文件夹中已经产生了可执行文件DisplayImage，随便从网上下载一张图片放在opencv-test文件夹下，此处下载了opencv.jpg，然后运行

    ./DisplayImage opencv.jpg  

安装python的opencv库

    sudo apt-get install python-opencv  
    sudo apt-get install python-numpy  

#coding=utf-8

import cv2

img=cv2.imread("9-14-8.jpg")
"""
cv2.namedWindow("src")
cv2.imshow("src",img)
cv2.waitKey(0)
"""
cv2.imwrite("1.jpg",img)