98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
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/*
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* FGBGTest.cpp
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*
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* Created on: May 7, 2012
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* Author: Andrew B. Godbehere
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*/
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#include <opencv2/opencv.hpp>
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#include <iostream>
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#include <sstream>
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using namespace cv;
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static void help()
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{
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std::cout <<
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"\nA program demonstrating the use and capabilities of a particular BackgroundSubtraction\n"
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"algorithm described in A. Godbehere, A. Matsukawa, K. Goldberg, \n"
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"\"Visual Tracking of Human Visitors under Variable-Lighting Conditions for a Responsive\n"
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"Audio Art Installation\", American Control Conference, 2012, used in an interactive\n"
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"installation at the Contemporary Jewish Museum in San Francisco, CA from March 31 through\n"
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"July 31, 2011.\n"
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"Call:\n"
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"./BackgroundSubtractorGMG_sample\n"
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"Using OpenCV version " << CV_VERSION << "\n"<<std::endl;
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}
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int main(int argc, char** argv)
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{
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help();
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setUseOptimized(true);
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setNumThreads(8);
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Ptr<BackgroundSubtractorGMG> fgbg = Algorithm::create<BackgroundSubtractorGMG>("BackgroundSubtractor.GMG");
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if (fgbg == NULL)
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{
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CV_Error(CV_StsError,"Failed to create Algorithm\n");
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}
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fgbg->set("smoothingRadius",7);
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fgbg->set("decisionThreshold",0.7);
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VideoCapture cap;
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if( argc > 1 )
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cap.open(argv[1]);
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else
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cap.open(0);
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if (!cap.isOpened())
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{
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std::cout << "error: cannot read video. Try moving video file to sample directory.\n";
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return -1;
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}
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Mat img, downimg, downimg2, fgmask, upfgmask, posterior, upposterior;
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bool first = true;
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namedWindow("posterior");
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namedWindow("fgmask");
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namedWindow("FG Segmentation");
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int i = 0;
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for (;;)
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{
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std::stringstream txt;
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txt << "frame: ";
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txt << i++;
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cap >> img;
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putText(img,txt.str(),Point(20,40),FONT_HERSHEY_SIMPLEX,0.8,Scalar(1.0,0.0,0.0));
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resize(img,downimg,Size(160,120),0,0,INTER_NEAREST); // Size(cols, rows) or Size(width,height)
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if (first)
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{
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fgbg->initializeType(downimg,0,255);
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first = false;
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}
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if (img.empty())
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{
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return 0;
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}
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(*fgbg)(downimg,fgmask);
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fgbg->updateBackgroundModel(Mat::zeros(120,160,CV_8U));
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fgbg->getPosteriorImage(posterior);
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resize(fgmask,upfgmask,Size(640,480),0,0,INTER_NEAREST);
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Mat coloredFG = Mat::zeros(480,640,CV_8UC3);
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coloredFG.setTo(Scalar(100,100,0),upfgmask);
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resize(posterior,upposterior,Size(640,480),0,0,INTER_NEAREST);
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imshow("posterior",upposterior);
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imshow("fgmask",upfgmask);
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resize(img, downimg2, Size(640, 480),0,0,INTER_LINEAR);
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imshow("FG Segmentation",downimg2 + coloredFG);
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int c = waitKey(30);
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if( c == 'q' || c == 'Q' || (c & 255) == 27 )
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break;
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}
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}
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