[mythtv] [Draft] Filter documentation.

[Andrew Mahone]

On Wednesday 28 January 2004 02:23, Bruce Markey wrote:
> Signal certainly has an impact on compression algorithms but
> are you saying that the same code is run per pixel regardless
> of the amount of compensation?

Denoise3D uses a lookup table, and always filters every pixel, so it has 
constant speed with respect to filter strength or input noise level.

Quickdnr and kerneldeint apply filters conditionally to parts of the image.  
On systems without MMX, quickdnr will probably be slower for video with more 
noise, and kerneldeint will be slower for video with more severe combing.  
Both will be slower when thresholds are set higher, as well.  Because of how 
the MMX implementation of these filters work, this is not the case for 
systems with MMX available.  The MMX versions of these filters perform the 
same operations on all pixels, so input frame size should be the only thing 
that affects their speed.

> Are there any other misleading statements, glaring omissions,
> clarifications that may avoid frequent questions from users?

I re-read the new version, and I don't see any obvious errors.
-- 
  Andrew Mahone
  andrewmahone AT eml DOT cc