G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing
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A Full-Featured Open-Source Framework for Image Processing



Latest stable version: 4.0.4 (2026/08/19)

Reference
Table of Contents  ▸  List of Commands  ▸  Reptorian's Commands  ▸  rep_channels_overblur_overline_blur_sharpen◀  rep_val2order    |    rep_decompose_bitplanes  ▶

rep_channels_overblur_overline_blur_sharpen

Arguments:

  • method_a={ 0=blur | 1=sharpen | 2=overblur | 3=overline },0%<_effect_factor_a[%]<=100%,_multiplication_factor>0,_blending_mode,0<_blending_opacity[%]<=100%...

Description:

Apply BSOO filtering over channels within images.

blending_mode can be { add | alpha | and | average | burn | darken | difference | divide | dodge | exclusion | freeze | grainextract | grainmerge | hardlight | hardmix | interpolation | lighten | linearburn | linearlight | multiply | normal | negation | or | overlay | pinlight | reflect | screen | shapeaverage | softburn | softdodge | softlight | stamp | subtract | vividlight | xor }.
Note on 3 Channels Color Spaces (RGB, HSV...) input -
If you want to perform the same setting on all channel at once, simply use 5 arguments.
If you want to perform same setting on all color channel at once, but separate for gray and alpha. Use 5*(contain_gray+contain_color+contain_alpha) arguments.
If you want to perform separate setting on different channels. You can use - to disable individual channel, or empty space to skip color channels altogether. If you have enabled support for manipulating color channel, yes, you must consider the number of arguments.
Special note: You can make this filter operate on CMYK space by writing cmyk as last argument.
Author : Reptorian.

Default values:

_effect_factor=100%,_multiplication_factor=100%,_blending_mode=21,_blending_opacity=100%,_effect_boundary=1

Example of use:

sp lena shape_cupid 512 blur. 10 *. 255 cut. 0,255 a c sp house rep_channels_blur_sharpen_overblur_overline 2,150,1.5,normal,100%,2,100,1,xor,100%,1,50,1,grainextract,100%

Command: sp lena shape_cupid 512 blur. 10 *. 255 cut. 0,255 a c sp house rep_channels_blur_sharpen_overblur_overline 2,150,1.5,normal,100%,2,100,1,xor,100%,1,50,1,grainextract,100%
Command: sp lena shape_cupid 512 blur. 10 *. 255 cut. 0,255 a c sp house rep_channels_blur_sharpen_overblur_overline 2,150,1.5,normal,100%,2,100,1,xor,100%,1,50,1,grainextract,100%
G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing

G'MIC is an open-source software distributed under the CeCILL free software licenses (LGPL-like and/or
GPL-compatible). Copyrights (C) Since July 2008, David Tschumperlé - GREYC UMR CNRS 6072, Image Team.