WGU-Capstone/validation/create_ground_truth.py

import cv2
import sys
 
tracker = cv2.TrackerMIL_create()

# Read video
video = cv2.VideoCapture("./validation/TestVideo.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 = (857, 189, 346, 434)

# Initialize tracker with first frame and bounding box
ok = tracker.init(frame, bbox)

frame_count = 0
while True:
    # Read a new frame
    ok, frame = video.read()
    if not ok:
        break
        
    # Start timer
    timer = cv2.getTickCount()

    # Update tracker
    ok, bbox = tracker.update(frame)

    # Calculate Frames per second (FPS)
    fps = cv2.getTickFrequency() / (cv2.getTickCount() - timer);

    # Draw bounding box
    if ok:
        # Tracking success
        p1 = (int(bbox[0]), int(bbox[1]))
        p2 = (int(bbox[0] + bbox[2]), int(bbox[1] + bbox[3]))

        with open("./ground_truth.txt", 'a') as output_file:
            output_file.write(f"{frame_count}, {p1[0]}, {p1[1]}, {p2[0]}, {p2[1]}\n")

        cv2.rectangle(frame, p1, p2, (255,0,0), 2, 1)
    else :
        # Tracking failure
        cv2.putText(frame, "Tracking failure detected", (100,80), cv2.FONT_HERSHEY_SIMPLEX, 0.75,(0,0,255),2)
    
    # Display FPS on frame
    cv2.putText(frame, "FPS : " + str(int(fps)), (100,50), cv2.FONT_HERSHEY_SIMPLEX, 0.75, (50,170,50), 2)

    # Display result
    cv2.imshow("Tracking", frame)

    frame_count += 1

    # Exit if ESC pressed
    k = cv2.waitKey(1) & 0xff
    if k == 27 : break