opencv学习笔记（二十五）——实现相机拍照功能

由于相机标定需要多张棋盘照片，所以写了一个相机拍照程序。主要原理是：创建一个滑块，当作相机的快门，然后通过一个回调函数保存窗口的图片。
源代码如下：

#pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" )   //掩藏控制台#include<iostream>#include <fstream>  #include<opencv2/opencv.hpp>const int g_nMaxValue = 1;int g_nValue;IplImage *frame;char *namecode[14] = {  "1.jpg", "2.jpg", "3.jpg",                         "4.jpg","5.jpg", "6.jpg",                         "7.jpg", "8.jpg", "9.jpg",                        "11.jpg", "12.jpg", "13.jpg",                        "14.jpg"                     };int i = 0;void TakePhoto(int, void*){    i++;    cvSaveImage(namecode[i-1], frame);    if (i == 13)    {        i = 0;    }    std::cout << "拍照成功" << std::endl;}int main(){    cv::Mat image;    g_nValue = 0;    CvCapture *capture = cvCreateCameraCapture(0);    cvNamedWindow("Camera");    //创建一个滑块当按钮    cv::createTrackbar("Photo", "Camera", &g_nValue, g_nMaxValue, TakePhoto);    while (1)    {        frame = cvQueryFrame(capture);        if (!frame) break;        cvShowImage("Camera", frame);        char c = cvWaitKey(33);        if (c == 27) break;    }    return 0;}