Checkmate

Revision as of 14:06, 28 November 2013

Description

Spatial and temporal dot crawl reducer. Checkmate is most effective in static or low motion scenes. When using in high motion scenes (or areas) be careful, it's known to cause artifacts with its the default values.

Requirements:

- AviSynth 2.5.8 or later

- Supported color formats: YV12

Syntax and Parameters

checkmate(clip, int "thr", int "max", int "tthr2")

thr int = 12

Spatial threshold:

Controls the spatial filter, higher values will blend more but cause artifacts if set to high.

If set to low, lines in static scenes where dot crawl was reduced will become slightly more blurry.

max int = 12

Controls the maximum amount by which a pixel's value may change. Higher values will increase the strength of the filtering but cause artifacts if set to high.

tthr2 int = 5

Temporal threshold:

Controls the temporal blending; higher values will blend more but cause artifacts if set to high.

Setting this to 0 disables the temporal blending entirely. This may be helpful to reduce temporal artifacts in high motion scenes.

Note: Official documentation was never released. The valid range for the parameters is unknown. It's probably best to set those values not too distant from their defaults.

Examples

Checkmate with default values:

AviSource("Blah.avi")
checkmate(thr=12, max=12, tthr2=5)

Links

• Scintilla's Guide - Unofficial documentation
• Doom9 Forum - Archived download.
• VideoHelp - Archived download.

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