opencv学习之路（3）、批量读取图片、视频分解、视频合成

一、批量有序读取图片

 1 #include<opencv2/opencv.hpp>
 2 
 3 using namespace cv;
 4 
 5 void main()
 6 {
 7     //批量读取图片（有序）
 8     char filename[50];
 9     char winName[50];
10     Mat srcImg;
11     for (int i = 1; i < 100; i++)
12     {
13         sprintf(filename,"%d.bmp",i);
14         sprintf(winName,"NO--%d",i);
15         srcImg=imread(filename);
16         if (srcImg.empty())
17             break;
18         imshow(winName,srcImg);
19     }
20     waitKey(0);
21     destroyAllWindows();
22 }

二、视频分解成图片

需要提前在E盘创建pic文件夹

 1 #include<opencv2/opencv.hpp>
 2 
 3 using namespace cv;
 4 
 5 void main()
 6 {
 7     Mat frame;
 8     char outfile[50];
 9     VideoCapture cap("E:\\2.avi");
10     if (!cap.isOpened())//打开失败
11         return;
12     int totalFrame=cap.get(CV_CAP_PROP_FRAME_COUNT);//获取视频总帧数
13     for (int i = 1; i <=totalFrame; i++)
14     {
15         cap>>frame;
16         if (frame.empty())
17             break;
18         sprintf(outfile,"E:\\pic\\%d.bmp",i);
19         imwrite(outfile,frame);
20         imshow("video",frame);
21         waitKey(15);
22     }
23     cap.release();
24     destroyAllWindows();
25 }

三、图片合成视频

 1 #include<opencv2/opencv.hpp>
 2 #include<iostream>
 3 using namespace cv;
 4 using namespace std;
 5 
 6 void main()
 7 {
 8     VideoWriter writer("E:\\out.avi",CV_FOURCC('X','V','I','D'),20,Size(320,240),true);//Size要和图片尺寸保持一致
 9     char filename[50];
10     Mat frame;
11     for (int i = 1; i < 644; i++)
12     {
13         sprintf(filename,"E:\\pic\\%d.bmp",i);
14         frame=imread(filename);
15         if(frame.empty())   break;
16         writer<<frame;
17     }
18     cout<<"write end!"<<endl;
19     destroyAllWindows();
20 }

 

 

posted @ 2017-07-13 19:59  进击的小猴子  阅读(6474)  评论(0)  编辑  收藏  举报