opencv_tracking.py

from imutils.video import VideoStream
from imutils.video import FPS
import argparse
import imutils
import time
import cv2

ap = argparse.ArgumentParser()
ap.add_argument("-v", "--video", type=str,
    help="path to input video file")
ap.add_argument("-t", "--tracker", type=str, default="kcf",
    help="OpenCV object tracker type")
args = vars(ap.parse_args())

initBB = None
tracker = None

def create():
    (major, minor) = cv2.__version__.split(".")[:2]
    if int(major) == 3 and int(minor) < 3:
        tracker = cv2.Tracker_create(args["tracker"].upper())
    else:
        OPENCV_OBJECT_TRACKERS = {
            "csrt": cv2.TrackerCSRT_create,
            "kcf": cv2.TrackerKCF_create,
            "boosting": cv2.TrackerBoosting_create,
            "mil": cv2.TrackerMIL_create,
            "tld": cv2.TrackerTLD_create,
            "medianflow": cv2.TrackerMedianFlow_create,
            "mosse": cv2.TrackerMOSSE_create
        }
        tracker = OPENCV_OBJECT_TRACKERS[args["tracker"]]()
    return tracker

if not args.get("video", False):
    print("[INFO] starting video stream...")
    vs = VideoStream(src=0).start()
    time.sleep(1.0)
else:
    vs = cv2.VideoCapture(args["video"])

while True:
    frame = vs.read()
    frame = frame[1] if args.get("video", False) else frame
    if frame is None:
        break

    frame = imutils.resize(frame, width=1280)
    (H, W) = frame.shape[:2]


    if initBB is not None:
        (success, box) = tracker.update(frame)

        if success:
            print('Track:', box)
            (x, y, w, h) = [int(v) for v in box]
            cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)

        info = [
            ("Tracker", args["tracker"]), 
            ("Success", "Yes" if success else "No"),
        ]

        for (i, (k, v)) in enumerate(info):
            text = "{}: {}".format(k, v)
            #cv2.putText(frame, text, (10, H - ((i * 20) + 20)), cv2.FONT_HERSHEY_SIMPLEX, 0.6, (0, 0, 255), 2)

    cv2.imshow("Frame", frame)
    key = cv2.waitKey(0) & 0xFF

    if key == ord("s"):
        initBB = cv2.selectROI("Frame", frame, fromCenter=False, showCrosshair=True)
        tracker = create()
        tracker.init(frame, initBB)
    elif key == ord("q"):
        break

if not args.get("video", False):
    vs.stop()
else:
    vs.release()

cv2.destroyAllWindows()