Function calculate_frame_delta

tests/test_video_stream.py:50–55

(frame_a, frame_b, roi=None)

def calculate_frame_delta(frame_a, frame_b, roi=None) -> float:
    if roi:
        raise RuntimeError("TODO")
    assert frame_a.shape == frame_b.shape
    num_pixels = frame_a.shape[0] * frame_a.shape[1]
    return numpy.sum(numpy.abs(frame_b - frame_a)) / num_pixels


# TODO: Reduce code duplication here and in `conftest.py`