Editing SelectiveColour

{{FilterCat4|External_filters|Plugins|Adjustment_filters|Levels_and_Chroma_filters}}
{{Filter3
|{{Author/David Horman}}
|2011/10/08
|[http://horman.net/avisynth/download/selectivecolour.zip selectivecolour.zip]
|Levels and Chroma
|5=Closed source
|6=[https://forum.doom9.org/showthread.php?t=151259 Doom9 Thread]}}

== Description ==
[[SelectiveColour]] - AviSynth implementation of Photoshop's selective colour adjustment.
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== Requirements ==
* [x86]: [[AviSynth+]] or [https://sourceforge.net/projects/avisynth2/ AviSynth 2.5.8 or greater]
* Supported color formats: [[RGB32]]
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== [[Script variables|Syntax and Parameters]] ==
:{{Template:FuncDef|selectivecolour (clip, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, float, bool)}}
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::{{Par2| |clip| }}
:::Input clip; must be RGB32.
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::{{Par2| |float| }}
:::This filter partially copies the actions of Photoshop's "Selective colour" image adjustment action. Apart from an input clip it takes 19 arguments.
:::The first 18 are floats in the range -1 to 1 (other values are accepted, but that behaviour is not well defined). 
:::These are in groups of three, representing the Cyan, Magenta, and Yellow %ages (normalized) present in Photoshop's Selective Color dialogue for each of the six colour sections (reds, yellows, greens, cyans, blues, magentas).
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::{{Par2| |bool| }}
:::Boolean to choose either relative (false) or absolute (true) mode, as per the Photoshop dialogue box.
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::<span style="color:red">'''Note:'''</span> all parameters are unnamed and do not have a default so they must be specified.
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== Examples ==
Usage:

 [[AviSource]]("blah.avi")
 ConvertToRGB32()
 selectivecolour(last,\
 0.5,0,0,\
 0.25,0.1,0,\
 1,-0.5,-0.25,\
 -0.5,0.5,-0.5,\
 0.1,0.2,0.3,\
 -0.1,-0.2,-0.3,\
 true)
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The six triples act on the following sets of pixels (a pixel may be a member of up to 2 adjacent sets):

*Reds: those pixels where R>G and B
*Yellows: R and G>B
*Greens: G>R and B
*Cyans: G and B>R
*Blues: B>R and G
*Magentas: R and B>G

The first number in a triple alters the Red channel, the second the Green channel, the third the Blue channel. Because Photoshop calls these values Cyan, Magenta and Yellow, the numbers work backwards - if you want to increase the intensity of a channel, use a negative number, and vice versa.

The filter doesn't currently implement the "Black" value in Photoshop.

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== Changelog ==
 Version      Date            Changes<br>
              2011/10/08      - The filter's now written a bit better, doesn't 
                                suffer from pitch problems, and is multithreaded.
              2009/12/10      - Initial release.
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== Archived Downloads ==
{| class="wikitable" border="1"; width="400px"
|-
!!width="100px"| Version
!!width="150px"| Download
!!width="150px"| Mirror
|-
!2011/10/08
|[http://horman.net/avisynth/download/selectivecolour.zip selectivecolour.zip]
|[https://web.archive.org/web/20200710170652if_/http://horman.net/avisynth/download/selectivecolour.zip selectivecolour.zip]
|}
*[https://gist.github.com/Reel-Deal/fea699670ac91d4fcbbc31dbfec509a9 Source code]
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==External Links ==
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