SPresso

Abstract
Author	Didée
Version	2006/09/04
Download	SPresso script
Category	Spatial-Temporal Denoisers
License
Discussion	Doom9 Thread

Description

SPresso (Spatial Pressdown) is a purely spatial script designed to achieve better compressibility without doing too much harm to the original detail.
SPresso was not designed for 1080p processing/encoding; due to its 3x3 kernel it works better on standard definition (SD) content like DVDs and possibly on 720p.
On noisy DVD/SD sources, compression gain usually is from 2% to 3% (light settings -> changes almost invisible) up to 10 to 12% (stronger settings -> slight, gentle softening, not very obvious).

Requirements

• AviSynth 2.5.8 or later
• Progressive input only
• Supported color formats: YV12

Required Plugins

Latest versions of the following filters are recommended unless stated otherwise.

• MaskTools2
• RgTools - Replacement of RemoveGrain v1.0b

Syntax and Parameters

SPresso (clip clp, int "limit", int "bias", int "RGmode", int "limitC", int "biasC", int "RGmodeC")

clip  clp =

Input clip.

int  limit = 2

Limit the maximum change for any given pixel.

int  bias = 25

Something like "aggessivity": '20' is a very light setting, '33' is already quite strong.

int  RGmode = 4

RemoveGrain mode for the luma (Y) channel. The default of "4" is the best in most cases.

Mode 19 and 20 might work better in other cases; if set to 0, luma will be copied from the input clip.

int  limitC = 4

Same as limit but for chroma.

int  biasC = 50

Same as bias but for chroma.

int  RGmodeC = 0

RemoveGrain mode for the chroma channels (UV) channels; by default the chroma is simply copied from the input clip.

To process chroma, set RGmodeC=4 (or 19, 20, or any other compatible mode).

Examples

SPresso with all default values:

AviSource("Blah.avi")
SPresso(limit=2, bias=25, RGmode=4, limitC=4, tlimiC=50, RGmodeC=0)

Changelog

Version         Date            Changes

2006/09/04      2006/09/04      - Corrected a BIG bug

2006/08/24      2006/08/24      - Added chroma processing
                                - Now uses MaskTools2 by default.

2005/11/28      2005/11/28      - Initial release

External Links

• Doom9 Forum - SPresso discussion.
  

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