To me that sounds like a distinction without a difference. A jpeg is not an image, but a set of data that can be algorithmically processed and rendered as an image - which is why it can fit in a smaller space than a bmp. Despite the technical differences, a jpg and a bmp are legally equivalent. If something is illegal in a bmp, it’s also illegal in a jpg. The same laws apply to EVs and gas vehicles. The same laws apply to vinyl records and cassette tapes. The law does not care about the mechanism.*