opencv处理两张图片的帧差（C++实现）

这个程序是两张图片做帧差，用C++实现的，把不同的地方用框框起来，仔细读一下程序，应该还是蛮简单的哈哈，opencv处理图片的基础。

opencv配置不用我说了吧，源码cmake编译，然后导入vs即可。

#include 
#include 

using namespace std;
using namespace cv;

int main()
{
	
	Mat currentframe, previousframe;
	Mat img1, img2, img3;

	img1 = imread("D:/1129/20006/1123120.jpg");
	img2 = imread("D:/1129/20006/1128120.jpg");
	img3 = imread("D:/1129/20006/1128120.jpg");

	cvtColor(img1, previousframe, CV_BGR2GRAY);
	cvtColor(img2, currentframe, CV_BGR2GRAY);	//转化为单通道灰度图

	absdiff(currentframe, previousframe, currentframe);//做差求绝对值  
	threshold(currentframe, currentframe, 130, 255.0, CV_THRESH_BINARY);
	dilate(currentframe, currentframe, Mat());//膨胀
	erode(currentframe, currentframe, Mat());//腐蚀

	imshow("moving area", currentframe);	//显示图像  

	vector > v;
	vector hierarchy;
	Mat result;
	Rect rect;
	findContours(currentframe, v, hierarchy, RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);
	for (int i = 0; i < hierarchy.size(); i++)
	{
		rect = boundingRect(v.at(i));
		//rect.width *= 1.5;
		rect.height *= 1.5;
		// 画最小的圆，贴着黑色
		//drawContours(currentframe, v, i, Scalar(0, 0, 255), 1, 8, hierarchy);
		// 画矩形包围圆
		rectangle(img3, rect, Scalar(0, 255, 0), 2);
	}

	imwrite("E:/res1.jpg", img3);
	imshow("moving area1", img3);
	
	//把当前帧保存作为下一次处理的前一帧  
	//cvtColor(tempframe, previousframe, CV_BGR2GRAY);
	waitKey(33);
	system("pause");
	return 0;

}