Python and opencv : tracker example

Taken from

Link import cv2

import sys

if __name__ == '__main__' :

    # Set up tracker.

    # Instead of MIL, you can also use

    # BOOSTING, KCF, TLD, MEDIANFLOW or GOTURN

     

    tracker = cv2.Tracker_create("MIL")

    # Read video

    video = cv2.VideoCapture("videos/chaplin.mp4")

    # Exit if video not opened.

    if not video.isOpened():

        print "Could not open video"

        sys.exit()

    # Read first frame.

    ok, frame = video.read()

    if not ok:

        print 'Cannot read video file'

        sys.exit()

     

    # Define an initial bounding box

    bbox = (287, 23, 86, 320)

    # Uncomment the line below to select a different bounding box

    # bbox = cv2.selectROI(frame, False)

    # Initialize tracker with first frame and bounding box

    ok = tracker.init(frame, bbox)

    while True:

        # Read a new frame

        ok, frame = video.read()

        if not ok:

            break

         

        # Update tracker

        ok, bbox = tracker.update(frame)

        # Draw bounding box

        if ok:

            p1 = (int(bbox[0]), int(bbox[1]))

            p2 = (int(bbox[0] + bbox[2]), int(bbox[1] + bbox[3]))

            cv2.rectangle(frame, p1, p2, (0,0,255))

        # Display result

        cv2.imshow("Tracking", frame)

        # Exit if ESC pressed

        k = cv2.waitKey(1) & 0xff

        if k == 27 : break