you want to estimate “bandwidth”.
you could do that with a fourier transform. plot the spectrum. it’s 2D, so you’ll get a picture. I’d recommend mapping the values logarithmically and “windowing” the range (10^{-6 } to 10^{0} or something, who knows, depends on lots of things)
I did that once with frames from some upscaled video (1920x1080. one could roughly tell that the source material was DVD quality. you won’t see this too clearly but you can see it. you also see some effect in the vertical, which is due to interlacing, or rather, bad _de_interlacing. it kinda looks like there’s a stronger half/third/quarter-height resolution block (or worse), on top of a full-height resolution.
