more from the blu-ray screencaps site that are similar to my frames for you to comapre with (more and more it looks like either these caps were taken from a computer that either didn’t do max decoding or had jpgs too compressed or that Lucasfilm actually did some filtering and various jiggering around with the image):
https://i1.wp.com/caps.pictures/200/2-starwars2/full/starwars2-movie-screencaps.com-352.jpg
https://i0.wp.com/caps.pictures/200/2-starwars2/full/starwars2-movie-screencaps.com-592.jpg
something about these screencaps feels odd, like dingy, let me look at my bluray before I post more comparisons to caps from that website