opencv3/C++视频中叠加透明图片的实现

2020-01-26 13:23:00

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如下所示：

大致思路：获取摄像头画面后，通过在图像上循环叠加一组背景透明的PNG图片，在图像上产生类似GIF的动图效果。

#include<opencv2/opencv.hpp>using namespace cv;//PNG透明图片叠加到视频int main(){  Mat frame;  VideoCapture capture;  capture.open(0);  if(!capture.isOpened())  {    printf("can not open the camear....../n");    return -1;  }  namedWindow("mask", CV_WINDOW_AUTOSIZE);  namedWindow("output", CV_WINDOW_AUTOSIZE);  while (capture.read(frame))  {    //翻转摄像头图像    flip(frame, frame, 1);    Mat image = frame;       for (int i = 1; i < 11; i++)    {      char filename[100];      sprintf(filename,"E:/image/image/00/%d.PNG",i);      //灰度图      Mat grayPng = imread(filename,0);            threshold(grayPng,grayPng,180,255,CV_THRESH_BINARY);      //掩模反色      Mat mask = 255 - grayPng;       imshow("mask",mask);      //读取背景透明的PNG图像      Mat png = imread(filename);      Mat imROI;      imROI = image(Rect(200,20,png.cols,png.rows));      png.copyTo(imROI,mask);      imshow("output",image);      //替换新图      image = frame;      waitKey(10);    }  }  waitKey();  return 0;}