title: PLogLinOFX
media types:
Video experimental
description: Convert between logarithmic and linear encoding.
This method uses the so-called "Josh Pines log conversion" or "printing density transform" (as described in http://lists.gnu.org/archive/html/openexr-devel/2005-03/msg00006.html), which is based on a single gray point, rather than the white and black points in the Cineon formula (as implemented in the Log2Lin plugin).
Log to Lin conversion: xLin = linRef * pow( 10.0, (xLog * 1023. - logRef)density/nGamma )
Lin to Log conversion: xLog = (logRef + log10(max( xLin, 1e-10 ) / linRef)nGamma/density) / 1023.
version: 2
creator: mr.fantastic mrfantastic@firemail.cc
license: GPLv2
URL: https://openeffects.org/
title: R
description:
Process red channel.
type: boolean
readonly: no
required: no
animation: yes
default: 1
title: G
description:
Process green channel.
type: boolean
readonly: no
required: no
animation: yes
default: 1
title: B
description:
Process blue channel.
type: boolean
readonly: no
required: no
animation: yes
default: 1
title: Operation
description:
The operation to perform.
type: string
readonly: no
required: no
animation: yes
default: Log to Lin
values:
title: Linear Reference
description:
Linear value of the reference gray point. Set this to the linear value that corresponds with the log reference value.
type: color
readonly: no
required: no
animation: yes
default: #2D2D2DFF
widget: color
title: Log Reference
description:
Log value of the reference gray point. Set this to the log value that corresponds with the lin reference value.
type: color
readonly: no
required: no
animation: yes
default: #434343FF
widget: color
title: Negative Gamma
description:
The film response gamma value.
type: color
readonly: no
required: no
animation: yes
default: #999999FF
widget: color
title: Density
description:
Density per code value. The change in the negative gamma for each log space code value. This is usually left to the default value of 0.002.
type: color
readonly: no
required: no
animation: yes
default: #000000FF
widget: color
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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