View Single Post
Old 14th June 2014, 16:10   #26653  |  Link
Frechdachs
Registered User
 
Frechdachs's Avatar
 
Join Date: May 2014
Posts: 20
Quote:
Originally Posted by StinDaWg View Post
I've mentioned this before, but now have a sample to back it up. Using anti-ringing filter on any of the downscaling algorithms after NNEDI3 causes jagged/aliased text. With the AR filter off text looks much, much better. This happens on any video I play, and can most easily be seen at the beginning of tv shows where it shows the actors names.

Take a look at the ticker at the bottom. Any letter with a diagonal like W, N, X, M, ect looks terrible with AR on.
http://www44.zippyshare.com/v/62692648/file.html
I can confirm this problem, I just wanted to report this myself. But it isn't only AR, using NNEDI3 together with a downscaler in linear light gives you dark halos around text. This is very noticeable on softsubs that are rendered at video resolution and upscaled/downscaled with NNEDI3/Lanczos3.
I also get weird artifacts when I double 480p content with NNEDI3 and then upscale it to 1080p with AR enabled.

I made two comparisons of the sample video that StinDaWg provided.

The first image is doubled with NNEDI3 (64 neurons) and downscaled with Lanczos3 without AR. The second is with AR. Notice the aliasing on the text at the bottom:
http://screenshotcomparison.com/comparison/79026

Comparison with linear light disabled/enabled:
http://screenshotcomparison.com/comparison/79027
The dark halos are most visible on the "A" in "INDIANS".

I still prefer NNEDI3 over everything else, for now I just disabled AR and linear light.

Last edited by Frechdachs; 14th June 2014 at 16:56.
Frechdachs is offline   Reply With Quote