kcf_tutorial.cpp

/*----------------------------------------------
 * Usage:
 * example_tracking_kcf <video_name>
 *
 * example:
 * example_tracking_kcf Bolt/img/%04.jpg
 * example_tracking_kcf faceocc2.webm
 *--------------------------------------------------*/

#include <opencv2/core/utility.hpp>
#include <opencv2/tracking.hpp>
#include <opencv2/videoio.hpp>
#include <opencv2/highgui.hpp>
#include <iostream>
#include <cstring>

using namespace std;
using namespace cv;

int main( int argc, char** argv ){
    // show help
    if(argc<2){
        cout<<
            " Usage: example_tracking_kcf <video_name>\n"
                    " examples:\n"
                    " example_tracking_kcf Bolt/img/%04.jpg\n"
                    " example_tracking_kcf faceocc2.webm\n"
            << endl;
        return 0;
    }

    // create the tracker
    Ptr<Tracker> tracker = TrackerKCF::create();

    // set input video
    std::string video = argv[1];
    VideoCapture cap(video);

    Mat frame;

    // get bounding box
    cap >> frame;
    Rect2d roi= selectROI("tracker", frame, true, false);

    //quit if ROI was not selected
    if(roi.width==0 || roi.height==0)
        return 0;

    // initialize the tracker
    tracker->init(frame,roi);

    // do the tracking
    printf("Start the tracking process, press ESC to quit.\n");
    for ( ;; ){
        // get frame from the video
        cap >> frame;

        // stop the program if no more images
        if(frame.rows==0 || frame.cols==0)
            break;

        // update the tracking result
        bool isfound = tracker->update(frame,roi);
        if(!isfound)
        {
            cout << "The target has been lost...\n";
            waitKey(0);
            return 0;
        }

        // draw the tracked object
        rectangle( frame, roi, Scalar( 255, 0, 0 ), 2, 1 );

        // show image with the tracked object
        imshow("tracker",frame);

        //quit on ESC button
        if(waitKey(1)==27)break;
    }

}