DeRainbow

Abstract
Author	sh0dan
Version	2014/02/23
Download	DeRainbow.avsi
Category	Rainbow & Dot Crawl Removal
License
Discussion

Description

A simple script to reduce rainbows.

Requirements

• AviSynth 2.5.8 or greater
• Supported color formats: YUY2, YV12
• Progressive input only

Required Plugins

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

• MaskTools2
• MipSmooth
• MSharpen

Syntax and Parameters

DeRainbow (clip org, int "thresh", bool "interlaced")

DeRainbowYUY2 (clip org, int "thresh", bool "interlaced")

clip  org =

Input clip.

int  thresh = 10

MSharpen threshold value; default is 10 (which is fairly strong).

bool  interlaced = false

False means the input clip is progressive; with true it's interlaced. Interlaced content is processed by using SeparateFields in the beginning and Weave at the end.

Note: this parameter was added as an after-thought, it's not technically correct so use with caution and only as a last resort.

Examples

DeRainbow with default settings:

AviSource("Blah.avi")
DeRainbow(thresh=10, interlaced=false)

Changelog

Version           Date            Changes

2014/02/23        2014/02/23      - Changed syntax to use MaskTools2.
                                  - Add "interlaced" parameter.

2003/11/12      2003/11/12      - Fixed DeRainbow and added a YUY2 version (much slower though), but with no chroma downsampling. 
                                  - I tweaked it a bit for best results on my current material. 
                                  - I also changed the blurs to MipSmooth.

2003/10/08      2003/10/08      - Initial release.
                                  - Originally named "Rainbow Killer"

External Links

• Doom9 Forum - Original "Rainbow Killer" discussion.
• Doom9 Forum - DeRainbow discussion.

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