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GMImage.Contrast
Contrast image (enhance intensity differences in image).
| Component | Version | macOS | Windows | Linux | Server | iOS SDK |
| GraphicsMagick | 2.0 | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
MBS( "GMImage.Contrast"; ImageRef; sharpen ) More
Parameters
| Parameter | Description | Example |
|---|---|---|
| ImageRef | The image reference number. | 1 |
| sharpen | The sharpen value. An integer number, either 0 or 1. |
1 |
Result
Returns "OK" on success.
Description
Contrast image (enhance intensity differences in image).Enhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced.
Examples
Changes contrast:
# load images...
Set Variable [ $Image ; Value: MBS( "GMImage.NewFromContainer"; test::Input) ]
# change constrast
Set Variable [ $r ; Value: MBS( "GMImage.Contrast"; $Image; 1) ]
# and save to container
Set Field [ test::Output ; MBS( "GMImage.WriteToPNGContainer"; $Image; "test.png") ]
# free memory
Set Variable [ $r ; Value: MBS( "GMImage.Release"; $Image) ]
See also
- GMImage.Coders
- GMImage.FontMap
- GMImage.New
- GMImage.NewFromContainer
- GMImage.Release
- GMImage.WriteToPNGContainer
This function checks for a license.
Created 18th August 2014, last changed 28th July 2021
