View source for Histograms in RGB & CMY

{{FilterCat4|External_filters|Scripts|Adjustment_filters|Levels and Chroma filters}}

{{Filter3
|-Vit-
|2012/04/20
|[http://avisynth.nl/images/Histograms_in_RGB_%26_CMY.avsi Histograms in RGB & CMY.avsi]
|Levels and Chroma
|
|6=[http://forum.doom9.org/showthread.php?p=1570968#post1570968 Doom9 Thread]}}
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== Description ==
A script to display RGB and CMY levels and a RGB parade color scope.<br>
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== Requirements ==
* AviSynth 2.5.8 or later
* Supported color formats: [[RGB24]], [[RGB32]], [[Y8]], [[YUY2]], [[YV411]], [[YV12]], [[YV16]], [[YV24]]
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== [[Script variables|Syntax and Parameters]] ==
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===HistogramRGBLevels / HistogramCMYLevels===
These two functions are like [[Histogram#Levels_mode|Histogram("levels")]] but for [[RGB]] and CMY instead of [[YUV]].
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:{{Template:FuncDef|HistogramRGBLevels (''clip'' input, ''bool'' "range", ''float'' "factor" )}}
:{{Template:FuncDef|HistogramCMYLevels (''clip'' input, ''bool'' "range", ''float'' "factor" )}}
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::{{Par2|input|clip| }}
::::Input clip.
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::{{Par2|range|bool|true}}
::::Set range=false to hide the 16-235 range (a left-over from the Y histogram used to build these)
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::{{Par2|factor|float|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. 
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:{{Template:FuncDef|HistogramRGBParade (''clip'' input, ''float'' "width" )}}
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::{{Par2|input|clip| }}
::::Input clip.
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::{{Par2|width|float|0.25}}
::::Controls the width of the histogram display (height will always be 256 pixels).
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== Examples ==
*HistogramRGBLevels with default settings:
 [[AviSource]]("blah.avi")
 HistogramRGBLevels(range=true, factor=100.0)<br>
 [[Image:HistogramRGBLevels.png]]
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*HistogramCMYLevels with default settings:
 [[AviSource]]("blah.avi")
 HistogramCMYLevels(range=true, factor=100.0)<br>
 [[Image:HistogramCMYLevels.png]]
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*HistogramRGBParade with default settings:
 [[AviSource]]("blah.avi")
 HistogramRGBParade(width=0.25)<br>
 [[Image:HistogramRGBParade.png]]
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== Changelog ==
 Version         Date            Changes<br>
 2012/04/20      2012/04/20      - Initial release
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==External Links ==
*[http://forum.doom9.org/showthread.php?p=1570968#post1570968 Doom9 Forum] - Histograms in RGB & CMY discussion.
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