100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
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#include "cvaux.h"
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#include "highgui.h"
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#include <stdio.h>
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#include <string>
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using namespace cv;
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void refineSegments(const Mat& img, Mat& mask, Mat& dst)
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{
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int niters = 3;
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vector<vector<Point> > contours;
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vector<Vec4i> hierarchy;
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Mat temp;
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dilate(mask, temp, Mat(), Point(-1,-1), niters);
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erode(temp, temp, Mat(), Point(-1,-1), niters*2);
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dilate(temp, temp, Mat(), Point(-1,-1), niters);
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findContours( temp, contours, hierarchy, CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE );
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dst = Mat::zeros(img.size(), CV_8UC3);
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if( contours.size() == 0 )
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return;
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// iterate through all the top-level contours,
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// draw each connected component with its own random color
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int idx = 0, largestComp = 0;
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double maxArea = 0;
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for( ; idx >= 0; idx = hierarchy[idx][0] )
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{
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const vector<Point>& c = contours[idx];
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double area = fabs(contourArea(Mat(c)));
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if( area > maxArea )
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{
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maxArea = area;
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largestComp = idx;
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}
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}
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Scalar color( 0, 0, 255 );
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drawContours( dst, contours, largestComp, color, CV_FILLED, 8, hierarchy );
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}
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int main(int argc, char** argv)
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{
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VideoCapture cap;
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bool update_bg_model = true;
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if( argc < 2 )
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cap.open(0);
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else
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cap.open(std::string(argv[1]));
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if( !cap.isOpened() )
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{
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printf("can not open camera or video file\n");
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return -1;
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}
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Mat tmp_frame, bgmask, out_frame;
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cap >> tmp_frame;
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if(!tmp_frame.data)
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{
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printf("can not read data from the video source\n");
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return -1;
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}
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namedWindow("video", 1);
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namedWindow("segmented", 1);
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BackgroundSubtractorMOG bgsubtractor;
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bgsubtractor.noiseSigma = 10;
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for(;;)
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{
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cap >> tmp_frame;
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if( !tmp_frame.data )
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break;
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bgsubtractor(tmp_frame, bgmask, update_bg_model ? -1 : 0);
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//CvMat _bgmask = bgmask;
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//cvSegmentFGMask(&_bgmask);
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refineSegments(tmp_frame, bgmask, out_frame);
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imshow("video", tmp_frame);
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imshow("segmented", out_frame);
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char keycode = waitKey(30);
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if( keycode == 27 )
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break;
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if( keycode == ' ' )
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update_bg_model = !update_bg_model;
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}
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return 0;
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}
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