althor1138 said:

I used several successive calls to generalconvolution to create an edge mask on the right side of bright areas next to dark areas and then shifted the mask over to match the right-edge halo of my laserdisc player. Then I used overlay with the mask and mode="multiply" to get rid of the halo. This isn't on every disc though so I guess it's combination of the laserdisc and the player which creates this sometimes. On ESB and TPM it's not very prominent like on SW for example.

Nice, thanks for that. I think most of the edge-enhancement artifacts we see is present in these transfers to begin with already, I don't know how much more work you're willing to spend on the 720p but you could easily improve the look of it if you wanted by just correcting the chroma shift in it, think it's most visible in the first few reels... good examples are the red wall lights on the blockade runner, the red light of Artoo in the canyon and the binary sunset, but I recall the shift isn't off by the same amount from scene to scene or is that constant so it may be a little tedious work.

http://www.geocities.com/siwalters_uk/chromashift.html

an example I did on arnie.d's cap to demonstrate the ugly bleed/shift in it, not perfect but definitely an improvement. Just a suggestion... hope you leave the 480p unfiltered.