加强版第十七章空间色彩转换-优快云博客

本文链接：https://blog.youkuaiyun.com/2301_79164062/article/details/144767740

API：cvtColor(frame, hsv, COLOR_BGR2HSV);

将视频进行空间色彩转换

#include<opencv2/opencv.hpp>
#include<iostream>
using namespace std;
using namespace cv;
int main(int argv, char** argc) {
   //VideoCapture capture(0);

   VideoCapture capture("C:/newword/image/21.mp4");
   if (!capture.isOpened()) {
       printf("0");
   }
   namedWindow("frame", WINDOW_AUTOSIZE);
   int fps = capture.get(CAP_PROP_FPS);
   int width = capture.get(CAP_PROP_FRAME_WIDTH);
   int heigh = capture.get(CAP_PROP_FRAME_HEIGHT);
   int num_of_frame = capture.get(CAP_PROP_FRAME_COUNT);
   int type = capture.get(CAP_PROP_FOURCC);
   printf("frame size(f=%d,w=%d,h=%d,m=%d)", fps, width, heigh, num_of_frame);

   Mat frame,hsv;
   VideoWriter writer("C:/newword/image/232320.mp4", type, fps, Size(width, heigh), true);
   while (true) {
       bool ret = capture.read(frame);
       if (!ret)break;
       imshow("ret", frame);
       cvtColor(frame, hsv, COLOR_BGR2HSV);
       imshow("hsv",hsv);
       writer.write(frame);
       char c = waitKey(50);
       if (c == 27) {
           break;
       }
   }
   waitKey(0);
       destroyAllWindows();
}

API：inRange(hsv, Scalar(35, 43, 46), Scalar(77, 255, 255), mask);根据bgr修改高低值

API:bitwise_not(mask, mask);取反

API:bitwise_and(frame, frame, result, mask);根据mask来将人物提取出来

将视频转化为白底黑色人物后取反

   Mat frame,hsv,mask;
   VideoWriter writer("C:/newword/image/232320.mp4", type, fps, Size(width, heigh), true);
   while (true) {
       bool ret = capture.read(frame);
       if (!ret)break;
       imshow("ret", frame);
       cvtColor(frame, hsv, COLOR_BGR2HSV);
       inRange(hsv, Scalar(35, 43, 46), Scalar(77, 255, 255), mask)：

bitwise_not(mask, mask);
       bitwise_and(frame, frame, result, mask);
       imshow("mask", mask);
       imshow("hsv",hsv);
       writer.write(frame);
       char c = waitKey(50);
       if (c == 27) {
           break;
       }
   }
   waitKey(0);
       destroyAllWindows();
}