Components All New MacOS Windows Linux iOS
Examples Mac & Win Server Client Guides Statistic FMM Blog Deprecated Old


Inverts an image.

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


Parameter Description Example
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

Release notes

Example Databases

Blog Entries

This function checks for a license.

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

GMImage.Implode - GMImage.IsGray