ChanMix

Abstract
Author	E-Male
Version	2005/02/28
Download	chanmix.zip
Category	Levels and Chroma
License
Discussion	Doom9 Thread

Description

Creates a greyscale image from an RGB24 source, it has 3 parameters to specify how much of each color channel is used.

Requirements

• [x86]: AviSynth+ or AviSynth 2.5.8 or greater
• Supported color formats: RGB24

Syntax and Parameters

chanmix (clip, float "r", float "g", float "b")

clip   =

Input clip.

float  r = 1.0

float  g = 1.0

float  b = 1.0

The weight of each color channel.

Gray = (red*r + green*g + blue*b) / (r+g+b)

Examples

ChanMix with default settings:

AviSource("blah.avi")
chanmix(r=1.0, g=1.0, b=1.0)

Here are some examples where ChanMix is visually identical (but slower) to Greyscale:

# Identical to Greyscale(matrix="Rec601") 
AviSource("blah.avi")
chanmix(r=0.299, g=0.587, b=0.114)

# Identical to Greyscale(matrix="Rec709")
AviSource("blah.avi")
chanmix(r=0.2126, g=0.7152, b=0.0722)

# Identical to Greyscale(matrix="Average")
AviSource("blah.avi")
chanmix(r=0.333333, g=0.333333, b=0.333333)

ChanMix with luma coefficients from Rec. 2020:

AviSource("blah.avi")
chanmix(r=0.2627, g=0.6780, b=0.0593)

Changelog

Version         Date            Changes

2005/02/28      2005/02/28      - Initial release

Archived Downloads

Version	Download	Mirror
2005/02/28	chanmix.zip	chanmix.zip

External Links

• Doom9 Forum - ChanMix discussion.

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