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GMImage.Unsharpmask

Component: GraphicsMagick
Mac OS X: Works
Windows: Works

MBS( "GMImage.Unsharpmask"; ImageRef; radius; sigma; amount; threshold )

Parameters

Parameter Description Example value
ImageRef The image reference (a number returned from the GMImage.New functions) 1
radius the radius of the Gaussian, in pixels, not counting the center pixel. 3
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. 50
threshold the threshold in pixels needed to apply the diffence amount. 3

Result

Returns "OK" on success.

Description

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

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