title: GMICExpr
media types:
Video experimental
description: Quickly generate or process image from mathematical formula evaluated for each pixel.
Full documentation for G'MIC/CImg expressions can be found at http://gmic.eu/reference.shtml#section9
The only difference is the predefined variables 'T' (current time) and 'K' (render scale).
Sample expressions:
'j(sin(y/100/k+t/10)20k,sin(x/100/k+t/10)20k)' distorts the image with time-varying waves.
'0.5*(j(1)-j(-1))' will estimate the X-derivative of an image with a classical finite difference scheme.
'if(x%10==0,1,i)' will draw blank vertical lines on every 10th column of an image.
Press the 'Help' button for more documentation or read the expression documentation at http://gmic.eu/reference.shtml#section9
Uses the 'fill' function from the CImg library. CImg is a free, open-source library distributed under the CeCILL-C (close to the GNU LGPL) or CeCILL (compatible with the GNU GPL) licenses. It can be used in commercial applications (see http://cimg.eu).
version: 2
creator: mr.fantastic mrfantastic@firemail.cc
license: GPLv2
URL: https://openeffects.org/
title: R
description:
Process red component.
type: boolean
readonly: no
required: no
animation: yes
default: 1
title: G
description:
Process green component.
type: boolean
readonly: no
required: no
animation: yes
default: 1
title: B
description:
Process blue component.
type: boolean
readonly: no
required: no
animation: yes
default: 1
title: A
description:
Process alpha component.
type: boolean
readonly: no
required: no
animation: yes
default: 0
title: Expression
description:
G'MIC/CImg expression, see the plugin description/help, or http://gmic.eu/reference.shtml#section9
type: string
readonly: no
required: no
animation: yes
default: i
title: (Un)premult
description:
Divide the image by the alpha channel before processing, and re-multiply it afterwards. Use if the input images are premultiplied.
type: boolean
readonly: no
required: no
animation: yes
title: Invert Mask
description:
When checked, the effect is fully applied where the mask is 0.
type: boolean
readonly: no
required: no
animation: yes
title: Mix
description:
Mix factor between the original and the transformed image.
type: float
readonly: no
required: no
animation: yes
minimum: 0
maximum: 1
default: 1
title: Top-Left Origin
description:
Set to 1 to use MLT top-left image origin instead of the OFX bottom-left origin. Use for plugins that crash or produce incorrect output with negative row bytes.
type: boolean
readonly: no
required: no
minimum: 0
maximum: 1
default: 0
widget: checkbox
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