// FrameDiff.cpp : 定義控制臺應用程序的入口點。 //#include"stdafx.h" #include<iostream> using namespace std; #include<opencv2\core\core.hpp> #include<opencv2\highgui\highgui.hpp> #include<opencv2\imgproc\imgproc.hpp> using namespace cv;const unsigned char FORE_GROUD = 127; int thresh = 15;int main(int argc, char*argv[]) {VideoCapture video("D:/文檔/研究生/研二/交通行為參數提取/數據/交叉口視頻/test1.avi");//判斷如果video是否可以打開if (!video.isOpened())return -1;//用于保存當前幀的圖片Mat currentBGRFrame;//用來保存上一幀和當前幀的灰度圖片Mat previousGrayFrame;Mat currentGaryFrame;//用來保存幀差Mat frameDifference;//CV_16SC1//用來保存幀差的絕對值Mat absFrameDifferece;//用來顯示前景Mat segmentation;//顯示原視頻namedWindow("原視頻", 0);//顯示前景namedWindow("二值化", 0);cvResizeWindow("二值化", 500, 500);createTrackbar("閾值:", "二值化", &thresh, FORE_GROUD, NULL);//幀數int numberFrame = 0;//形態學處理用到的算子Mat morphologyKernel = getStructuringElement(MORPH_RECT, Size(3, 3), Point(-1, -1));for (;;){//讀取當前幀video >> currentBGRFrame;//判斷當前幀是否存在if (!currentBGRFrame.data)break;numberFrame++;if (numberFrame == 1){//顏色空間的轉換cvtColor(currentBGRFrame, currentGaryFrame, COLOR_BGR2GRAY);//保存當前幀的灰度圖previousGrayFrame = currentGaryFrame.clone();imshow("原視頻", currentBGRFrame);continue;}else{//顏色空間的轉換cvtColor(currentBGRFrame, currentGaryFrame, COLOR_BGR2GRAY);//src1-src2subtract(currentGaryFrame, previousGrayFrame, frameDifference, Mat(), CV_16SC1);//取絕對值absFrameDifferece = abs(frameDifference);//位深的改變absFrameDifferece.convertTo(absFrameDifferece, CV_8UC1, 1, 0);//閾值處理threshold(absFrameDifferece, segmentation, double(thresh), double(FORE_GROUD), THRESH_BINARY);//中值濾波medianBlur(segmentation, segmentation, 3);//形態學處理(開閉運算)morphologyEx(segmentation,segmentation,MORPH_OPEN,morphologyKernel,Point(-1,-1),1,BORDER_REPLICATE);morphologyEx(segmentation, segmentation, MORPH_CLOSE, morphologyKernel, Point(-1, -1), 2, BORDER_REPLICATE);//顯示二值化圖片imshow("二值化", segmentation);//找邊界vector< vector<Point> > contours; //contours定義為2維浮點向量vector<Vec4i> hierarchy; //定義的層級findContours(segmentation, contours, hierarchy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE, Point(0, 0)); //CV_RETR_TREEvector< vector<Point> > contours_poly(contours.size());/*存儲運動物體*/vector<Rect> boundRect;boundRect.clear();//畫出運動物體//對視頻中出現的運動物體，進行初次的篩選for (int index = 0; index < contours.size(); index++){approxPolyDP(Mat(contours[index]), contours_poly[index], 3, true);Rect rect = boundingRect(Mat(contours_poly[index]));if (rect.area() > 400)rectangle(currentBGRFrame, rect, Scalar(0, 255, 255), 2);}//顯示原視頻namedWindow("原視頻", 1); imshow("原視頻", currentBGRFrame);//保存當前幀的灰度圖previousGrayFrame = currentGaryFrame.clone();}if (waitKey(33) == 'q')break;}return 0; }

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