Learning OpenCV 4 Computer Vision with Python 3

Running and testing the application

To complete the implementation of ImageTrackingDemo.py, let's write a main function that launches the application with a specified capture device, FOV, and target frame rate:

def main():    capture = cv2.VideoCapture(0)    capture.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)    capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 720)    diagonal_fov_degrees = 70.0    target_fps = 25.0    demo = ImageTrackingDemo(        capture, diagonal_fov_degrees, target_fps)    demo.run()if __name__ == '__main__':    main()

Here, we are using a capture resolution of 1280 x 720, a diagonal FOV of 70 degrees, and a target frame rate of 25 FPS. You should choose parameters that are appropriate for your camera and lens, and for the speed of your system.

Let's suppose we run ...