>>phonon+(OP)
Psychology more than anything, to be honest. I know it's supposed to be visually lossless, but it does touch and nudge many pixels, and I just want the raw image. I do dabble in graphics and UI frontend at times, and I don't want to take chances. It's something that spending a little more time digging into the algorithmic details of DSC might address for me, but I haven't so far.