三帧间差分法

2024-06-04 04:32

文章标签 差分法三帧

本文主要是介绍三帧间差分法，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

三帧差法
目的：解决帧间差分法的“双影”问题。算法步骤如下：
（1） Det1=framePre-framePrePre；
（2） Det2=frameNow-framePre；
（3） frameDet=Det1&Det2；
（4）形态学处理（如dilate）.

************************************************************************/
#include<opencv2/core/core.hpp>  
#include<opencv2/imgproc/imgproc.hpp>  
#include<opencv2/highgui/highgui.hpp>  
#include <opencv2/video/video.hpp>
#include <iostream>
using namespace cv;
using namespace std; cv::Mat frame;
cv::Mat result;
char image_name[25];//三帧间差分
int main()
{int i=0;cv::Mat framePrePre, framePre, frameNow, frameDet;cv::Mat contours, contoursInv;cv::Mat Det1, Det2;VideoCapture capture("Crowd-Activity-All.avi");if (!capture.isOpened()){return 0;}double videoFPS = capture.get(CV_CAP_PROP_FPS);  //获取帧率  double videoPause = 1000 / videoFPS;std::cout << videoFPS << endl;std::cout << videoPause << endl;capture >> framePrePre;capture >> framePre;cvtColor(framePrePre, framePrePre, CV_RGB2GRAY);cvtColor(framePre, framePre, CV_RGB2GRAY);int save = 0;bool stop(false);while (!stop){capture >> frameNow;if (frameNow.empty() || waitKey(videoPause) == 27){break;}cvtColor(frameNow, frameNow, CV_RGB2GRAY);Mat Det1;Mat Det2;absdiff(framePrePre, framePre, Det1);  //帧差1  absdiff(framePre, frameNow, Det2);     //帧差2  threshold(Det1, Det1, 0, 255, CV_THRESH_OTSU);  //自适应阈值化  threshold(Det2, Det2, 0, 255, CV_THRESH_OTSU);bitwise_and(Det1, Det2, frameDet);Mat element = getStructuringElement(0, Size(3, 3));  //膨胀核  dilate(frameDet, frameDet, element);    //膨胀  dilate(frameDet, frameDet, element);    framePrePre = framePre;framePre = frameNow;imshow("Video", frameNow);imshow("Detection", frameDet);sprintf(image_name, ".\\three frames subtraction method_image\\%d.jpg", ++i);imwrite(image_name, frameDet);}return 0;
}