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Inverts an image.

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
GraphicsMagick 8.4 Yes Yes Yes Yes Yes
MBS( "GMImage.InvertChannel"; ImageRef; Channel )   More


Parameter Description Example value
ImageRef The image reference number. 1
Channel Which channel to work with. Can be opacity, red, green or blue. The value rgb will apply effect to all three color channels. "rgb"


Returns OK or error.


Inverts an image.
All pixel values are negated.

This is same as MBS( "GMImage.MultiplyChannel"; ImageRef; Channel; -1; 0; 65535), but a bit faster.


Invert image:

Set Variable [ $image ; Value: MBS( "GMImage.NewFromContainer"; Invert::Input ) ]
# each channel...
// Set Variable [ $r ; Value: MBS( "GMImage.InvertChannel"; $image; "red") ]
// Set Variable [ $r ; Value: MBS( "GMImage.InvertChannel"; $image) ]
// Set Variable [ $r ; Value: MBS( "GMImage.InvertChannel"; $image; "blue") ]
# all channels...
Set Variable [ $r ; Value: MBS( "GMImage.InvertChannel"; $image; "rgb") ]
Set Field [ Invert::Output ; MBS( "GMImage.WriteToPNGContainer"; $image; "output.png") ]
Set Variable [ $r ; Value: MBS( "GMImage.Release"; $image) ]

See also

Example Databases

Blog Entries

Release notes

Created 13th September 2018, last changed 11st November 2019

GMImage.Implode   -   GMImage.IsGray

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