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GMImage.UnsharpmaskChannel

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

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
GraphicsMagick 2.0 Yes Yes Yes Yes Yes

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

Parameters

Parameter Description Example value
ImageRef The image reference number. 1
ChannelType ChannelType One of the following values: RedChannel = 1 (RGB Red channel), CyanChannel = 2 (CMYK Cyan channel), GreenChannel = 3 (RGB Green channel), MagentaChannel = 4 (CMYK Magenta channel), BlueChannel = 5 (RGB Blue channel), YellowChannel = 6 (CMYK Yellow channel), OpacityChannel = 7 (Opacity channel), BlackChannel = 8 (CMYK Black (K) channel), MatteChannel = 9 (Same as Opacity channel (deprecated)), AllChannels = 10 (Color channels), GrayChannel = 11 (Color channels represent an intensity.)
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.

GMImage.Unsharpmask   -   GMImage.Wave

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Links
MBS Xojo tutorial videos