I would think that what you're suggesting could be done by doing a bunch of Fourier transforms. If there is no relative motion of the camera you could assume th

I would think that what you're suggesting could be done by doing a bunch of Fourier transforms. If there is no relative motion of the camera you could assume that objects with high frequencies would be less massive than objects with low frequencies that could give you a useful bound on their mass/density. (Assuming a fairly uniform energy density in the scene) For my own curiosity, I wonder if some of the variables they're missing are based more on the context of the video, rather than the content. Like, colors, for instance. Maybe if you ran everything through in black and white you could get it closer to an integer lower bound?