Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Capturing and Editing Video > Avisynth Usage

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 11th September 2002, 16:36   #11  |  Link
trbarry
Registered User
 
trbarry's Avatar
 
Join Date: Oct 2001
Location: Gainesville FL USA
Posts: 2,092
Quote:
About resize, does anybody know if last bug of simpleresize.dll concerning chroma/luma shift has been solved?
Haven't find any post by trbarry talking about this... yet.
Sorry, some other stuff came up and I confess I haven't done anything on that. I'll try to get back to it soon.

But SimpleResize is just an optimized bilinear resize without the triangle filter. This means it goes faster but does not filter and is then (duh) best when you don't need any filtering. So if you had overly sharp material already (uncommon) then it could create aliasing artifacts if you downsized a lot. And of course it passes through all the noise, but also all the detail.

I think the more sophisticated (but slower) algorithms like BiCubic and Lanczos3 are general purpose and can do a much better job when upsizing, filling in gradients smoothly. SimpleResize probably wouldn't upsize very well, at least at ratios bigger than (swag) 1.5:1 or so. But of course for encoding purposes we are usually downsizing.

Anyway, I promise to go look for the chroma shift bug.

- Tom
trbarry is offline   Reply With Quote
 

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 00:45.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.