A raster image in a PDF uses the same exact JPEG compression, most likely.
I didn't like any of the existing Linux scanning solutions, so I built my own paperless management tool. I was evaluating different compression algorithms for keeping authoritative masters and was eyeing JPEG2000 (I hate JPEG artifacts). But in the end I decided to go with FLIF, which is lossless. Despite its lower amount of battle testing, being lossless allows me to run a sha256 on the decompressed image and know that it is exactly what I had scanned in.
I didn't like any of the existing Linux scanning solutions, so I built my own paperless management tool. I was evaluating different compression algorithms for keeping authoritative masters and was eyeing JPEG2000 (I hate JPEG artifacts). But in the end I decided to go with FLIF, which is lossless. Despite its lower amount of battle testing, being lossless allows me to run a sha256 on the decompressed image and know that it is exactly what I had scanned in.