Topics   All   MacOS (Only)   Windows (Only)   Linux (Only, Not)   iOS (Only, Not)  
Components   Crossplatform Mac & Win   Server   Client   Old   Deprecated   Guides   Examples   Videos
New in version: 9.5   10.0   10.1   10.2   10.3   10.4   10.5   11.0   11.1   11.2    Statistic    FMM    Blog  

GMImage.UnsharpmaskChannel

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.UnsharpmaskChannel"; ImageRef; ChannelType; radius; sigma; amount; threshold )   More

Parameters

Parameter Description Example
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.

Created 18th August 2014, last changed 18th August 2014


GMImage.Unsharpmask - GMImage.Wave

Feedback: Report problem or ask question.