True when two frames are visually unchanged within threshold bits. Default 3 tolerates spinner animation / anti-aliasing jitter while still catching any real content change. Two empty hashes are NOT similar (we cannot prove sameness without data).
threshold
True when two frames are visually unchanged within
thresholdbits. Default 3 tolerates spinner animation / anti-aliasing jitter while still catching any real content change. Two empty hashes are NOT similar (we cannot prove sameness without data).