Reference

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apply_channels

Arguments:

Description:

Apply specified command on the chosen color channel(s) of each selected images.

(equivalent to shortcut command ac).


Argument color_channels refers to a colorspace, and can be basically one of
{ all | rgba | [s]rgb | ryb | lrgb | ycbcr | lab | lch | hsv | hsi | hsl | cmy | cmyk | yiq }.
You can also make the processing focus on a few particular channels of this colorspace,
by setting color_channels as colorspace_channel (e.g. hsv_h for the hue).
All channel values are considered to be provided in the [0,255] range.

Default values:

value_action=0.

Example of use:

$ gmic image.jpg +apply_channels "equalize blur 2",ycbcr_cbcr

Command: image.jpg +apply_channels "equalize blur 2",ycbcr_cbcr
Command: image.jpg +apply_channels "equalize blur 2",ycbcr_cbcr