OpenCV4入门151：背景分割

索引地址：系列索引

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#include "opencv2/opencv.hpp"

using namespace std;
using namespace cv;

int main() {
    VideoCapture cam(0);
    if (!cam.isOpened())
        return -1;

    int                          history        = 500;
    double                       dist2Threshold = 400.0;
    bool                         detectShadows  = true;
    Ptr<BackgroundSubtractorKNN> bgs =
        createBackgroundSubtractorKNN(history, dist2Threshold, detectShadows);

    while (true) {
        Mat frame;
        cam >> frame;
        if (frame.empty())
            break;

        Mat fgMask;
        bgs->apply(frame, fgMask);

        medianBlur(fgMask, fgMask, 3);

        Mat fg;
        bitwise_and(frame, frame, fg, fgMask);

        Mat bg;
        bgs->getBackgroundImage(bg);

        imshow("Video", frame);
        imshow("Background", bg);
        imshow("Foreground Mask", fgMask);
        imshow("Foreground Image", fg);

        int key = waitKey(10);
        if (key == 27) // escape key
            break;
    }

    cam.release();

    return 0;
}