125 lines
3.4 KiB
C++
125 lines
3.4 KiB
C++
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#include "opencv2/bgsegm.hpp"
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#include "opencv2/videoio.hpp"
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#include "opencv2/highgui.hpp"
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#include <opencv2/core/utility.hpp>
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#include <iostream>
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using namespace cv;
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using namespace cv::bgsegm;
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const String about =
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"\nA program demonstrating the use and capabilities of different background subtraction algorithms\n"
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"Using OpenCV version " + String(CV_VERSION) +
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"\n\nPress 'c' to change the algorithm"
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"\nPress 'm' to toggle showing only foreground mask or ghost effect"
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"\nPress 'n' to change number of threads"
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"\nPress SPACE to toggle wait delay of imshow"
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"\nPress 'q' or ESC to exit\n";
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const String algos[7] = { "GMG", "CNT", "KNN", "MOG", "MOG2", "GSOC", "LSBP" };
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static Ptr<BackgroundSubtractor> createBGSubtractorByName(const String& algoName)
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{
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Ptr<BackgroundSubtractor> algo;
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if(algoName == String("GMG"))
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algo = createBackgroundSubtractorGMG(20, 0.7);
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else if(algoName == String("CNT"))
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algo = createBackgroundSubtractorCNT();
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else if(algoName == String("KNN"))
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algo = createBackgroundSubtractorKNN();
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else if(algoName == String("MOG"))
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algo = createBackgroundSubtractorMOG();
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else if(algoName == String("MOG2"))
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algo = createBackgroundSubtractorMOG2();
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else if(algoName == String("GSOC"))
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algo = createBackgroundSubtractorGSOC();
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else if(algoName == String("LSBP"))
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algo = createBackgroundSubtractorLSBP();
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return algo;
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}
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int main(int argc, char** argv)
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{
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CommandLineParser parser(argc, argv, "{@video | vtest.avi | path to a video file}");
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parser.about(about);
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parser.printMessage();
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String videoPath = samples::findFile(parser.get<String>(0),false);
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Ptr<BackgroundSubtractor> bgfs = createBGSubtractorByName(algos[0]);
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VideoCapture cap;
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cap.open(videoPath);
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if (!cap.isOpened())
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{
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std::cerr << "Cannot read video. Try moving video file to sample directory." << std::endl;
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return -1;
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}
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Mat frame, fgmask, segm;
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int delay = 30;
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int algo_index = 0;
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int nthreads = getNumberOfCPUs();
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bool show_fgmask = false;
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for (;;)
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{
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cap >> frame;
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if (frame.empty())
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{
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cap.set(CAP_PROP_POS_FRAMES, 0);
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cap >> frame;
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}
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bgfs->apply(frame, fgmask);
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if (show_fgmask)
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segm = fgmask;
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else
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{
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frame.convertTo(segm, CV_8U, 0.5);
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add(frame, Scalar(100, 100, 0), segm, fgmask);
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}
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putText(segm, algos[algo_index], Point(10, 30), FONT_HERSHEY_PLAIN, 2.0, Scalar(255, 0, 255), 2, LINE_AA);
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putText(segm, format("%d threads", nthreads), Point(10, 60), FONT_HERSHEY_PLAIN, 2.0, Scalar(255, 0, 255), 2, LINE_AA);
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imshow("FG Segmentation", segm);
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int c = waitKey(delay);
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if (c == ' ')
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delay = delay == 30 ? 1 : 30;
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if (c == 'c' || c == 'C')
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{
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algo_index++;
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if ( algo_index > 6 )
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algo_index = 0;
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bgfs = createBGSubtractorByName(algos[algo_index]);
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}
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if (c == 'n' || c == 'N')
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{
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nthreads++;
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if ( nthreads > 8 )
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nthreads = 1;
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setNumThreads(nthreads);
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}
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if (c == 'm' || c == 'M')
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show_fgmask = !show_fgmask;
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if (c == 'q' || c == 'Q' || c == 27)
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break;
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}
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return 0;
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}
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