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GMImage.Unsharpmask

Replace image with a sharpened version of the original image using the unsharp mask algorithm.

Component Version macOS Windows Linux Server iOS SDK
GraphicsMagick 2.0 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "GMImage.Unsharpmask"; ImageRef; radius; sigma; amount; threshold )   More

Parameters

Parameter Description Example
ImageRef The image reference number. $Image
radius the radius of the Gaussian, in pixels, not counting the center pixel. 0
sigma the standard deviation of the Gaussian, in pixels. 1
amount the percentage of the difference between the original and the blur image that is added back into the original.
1 = 100%
1
threshold the threshold in pixels needed to apply the diffence amount. 0.05

Result

Returns "OK" on success.

Description

Replace image with a sharpened version of the original image using the unsharp mask algorithm.

Examples

Try it:

# Load from container
Set Variable [ $ImageRef ; Value: MBS("GMImage.NewFromContainer"; Test::BigImage) ]
# apply unsharp mask
Set Variable [ $Result ; Value: MBS("GMImage.Unsharpmask"; $ImageRef; 2; 1; 1; ,05) ]
# Store output and release the image
Set Field [ Test::Result ; MBS( "GMImage.WriteToPNGContainer"; $ImageRef ) ]
Set Variable [ $Error ; Value: MBS("GMImage.Free";$ImageRef) ]

See also

This function checks for a license.

Created 18th August 2014, last changed 27th September 2022


GMImage.Trim - GMImage.UnsharpmaskChannel

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