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Post #529702

Author
Spaced Ranger
Parent topic
THX 1138 "preservations" + the 'THX 1138 Italian Cut' project (Released)
Link to post in topic
https://originaltrilogy.com/post/id/529702/action/topic#529702
Date created
31-Aug-2011, 9:08 PM

msycamore said:

Here's a comparison with the fine transfer Jaitea provided, this will be a much better alternative than splicing in DVD footage. I'll see if I can apply some sharpening without introducing halos ...

There is an Avisynth sharpener designed to do just that -- LimitedSharpen. Halos are produced by sloppy sharpening algorithms creating boundaries instead of enhancing them:

LimitedSharpen does it the right way, which means sharpening without haloing:

See the Doom9 forum thread "Here is LimitedSharpen()" http://forum.doom9.org/showthread.php?threadid=84196 . It's 30-something pages so just review the several first and last pages for where it started and where it is today (fixes, etc.).

More information here: Avisynth - External Filters http://avisynth.org/mediawiki/External_filters

and here: Avisynth - LimitedSharpen http://avisynth.org/mediawiki/LimitedSharpen .