STPresso

Abstract
Author	Didée
Version	2012/01/15
Download	STPresso script
Category	Spatial-Temporal Denoisers
License
Discussion	Doom9 Thread

Description

The goal of STPresso (Spatio-Temporal Pressdown) is to "dampen the grain just a little, to keep the original look, and make it fast". In other words it makes a video more compressible without losing detail and original grain structure.
STPresso is recommended for content up to 720p because "the spatial part might be a bit too narrow for 1080p encoding (since it's only a 3x3 kernel)".

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.

• FluxSmooth
• MaskTools2
• RemoveGrain - part of the RemoveGrain v1.0b package.
• RgTools - recommended drop-in replacement for RemoveGrain!

Syntax and Parameters

STPresso (clip clp, int "limit", int "bias", int "RGmode", int "tthr", int "tlimit", int "tbias", int "back")

clip  clp =

Input clip.

int  limit = 3

Spatial limit: the spatial part won't change a pixel more than this.

int  bias = 24

The percentage of the spatial filter that will apply.

int  RGmode = 4

The spatial filter is RemoveGrain, this is its mode.

int  tthr = 12

Temporal threshold for FluxSmooth; Can be set "a good bit bigger" than usually.

int  tlimit = 3

The temporal filter won't change a pixel more than this.

int  tbias = 49

The percentage of the temporal filter that will apply.

int  back = 1

After all changes have been calculated, reduce all pixel changes by this value. (Shift "back" towards original value)

Examples

STPresso with all default values:

AviSource("Blah.avi")
STPresso(limit=3, bias=24, RGmode=4, tthr=12, tlimit=3, tbias=49, back=1)

Changelog

Version         Date            Changes

2012/01/15      2012/01/15      - Initial release

External Links

- Doom9 Forum - STPresso discussion.

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