Histograms in RGB & CMY

Abstract
Author	-Vit-
Version	2012/04/20
Download	Histograms in RGB & CMY.avsi
Category	Levels and Chroma
License
Discussion	Doom9 Thread

Description

A script to display RGB and CMY levels and a RGB parade color scope.

Requirements

• AviSynth 2.5.8 or later
• Supported color formats: RGB24, RGB32, Y8, YUY2, YV411, YV12, YV16, YV24

Syntax and Parameters

HistogramRGBLevels / HistogramCMYLevels

These two functions are like Histogram("levels") but for RGB and CMY instead of YUV.

HistogramRGBLevels (clip input, bool "range", float "factor" )

HistogramCMYLevels (clip input, bool "range", float "factor" )

clip  input =

Input clip.

bool  range = true

Set range=false to hide the 16-235 range (a left-over from the Y histogram used to build these)

float  factor = 100.0

The "factor" option specifies how the graphs are displayed. It is specified as percentage of the total population.

Range: 0.0 to 100.0

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HistogramRGBParade

Presents a fairly standard RGB parade color scope. It uses Histogram("classic") for each RGB component, but applied to columns rather than rows.

HistogramRGBParade (clip input, float "width" )

clip  input =

Input clip.

float  width = 0.25

Controls the width of the histogram display (height will always be 256 pixels).

Examples

• HistogramRGBLevels with default settings:

AviSource("blah.avi")
HistogramRGBLevels(range=true, factor=100.0)

• HistogramCMYLevels with default settings:

AviSource("blah.avi")
HistogramCMYLevels(range=true, factor=100.0)

• HistogramRGBParade with default settings:

AviSource("blah.avi")
HistogramRGBParade(width=0.25)

Changelog

Version         Date            Changes

2012/04/20      2012/04/20      - Initial release

External Links

• Doom9 Forum - Histograms in RGB & CMY discussion.

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