Method initTracker

src/CVTracker.cpp:127–168

Initialize the tracker

// Initialize the tracker
bool CVTracker::initTracker(cv::Mat &frame, size_t frameId)
{
    // Create new tracker object
    tracker = selectTracker(trackerType);

    // Correct negative width/height
    if (bbox.width < 0) {
        bbox.x    -= bbox.width;
        bbox.width = -bbox.width;
    }
    if (bbox.height < 0) {
        bbox.y     -= bbox.height;
        bbox.height = -bbox.height;
    }

    // Clamp to frame bounds
    clampRect(bbox, frame.cols, frame.rows);

    // Initialize tracker
    tracker->init(frame, bbox);

    float fw = float(frame.cols), fh = float(frame.rows);

    // record original pixel size
    origWidth  = bbox.width;
    origHeight = bbox.height;

    // initialize sub-pixel smoother at true center
    smoothC_x = bbox.x + bbox.width  * 0.5;
    smoothC_y = bbox.y + bbox.height * 0.5;

    // Add new frame data
    trackedDataById[frameId] = FrameData(
        frameId, 0,
        bbox.x           / fw,
        bbox.y           / fh,
        (bbox.x + bbox.width)  / fw,
        (bbox.y + bbox.height) / fh
    );

    return true;
}

// Update the object tracker according to frame
// returns true if KLT succeeded, false otherwise