>"Less than two bytes per source image, on average" doesn't sound to me like something implausible for a lossy compressor that is focused on such small subset of possible inputs, and gets to exploit high-level patterns…
I'm going to throw out (3) because it doesn't make any sense (to me), and we haven't found any evidence that this is true. (2) seems possible, but highly unlikely. (1) seems the most probable of the three options, and…
>"Less than two bytes per source image, on average" doesn't sound to me like something implausible for a lossy compressor that is focused on such small subset of possible inputs, and gets to exploit high-level patterns…
I'm going to throw out (3) because it doesn't make any sense (to me), and we haven't found any evidence that this is true. (2) seems possible, but highly unlikely. (1) seems the most probable of the three options, and…