I had a similar kind of lab in college. I ended up testing it on an image hand-picked for performing very poorly under JPEG compression, a GBA Pokemon game scre

I had a similar kind of lab in college. I ended up testing it on an image hand-picked for performing very poorly under JPEG compression, a GBA Pokemon game screenshot. Chroma subsampling alone visibly degraded the sharpness of brightly colored objects. Strangely chroma subsampling degrades photographic imagery far less, and helps less sophisticated algorithms (like JPEG) allocate limited bits better.