Negative Darkroom
Simulate a negative film enlargement in an analog darkroom.
Characteristic curve
Hardcoded characteristic curve and color data
name: curve
type: enum
Exposure
Base enlargement exposure
name: exposure
type: double
default: 0.00
minimum: -10.00
maximum: 10.00
ui-minimum: -5.00
ui-maximum: 5.00
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
Cyan filter
Cyan filter compensation for the negative image
name: expC
type: double
default: 60.00
minimum: 0.00
maximum: 300.00
ui-minimum: 0.00
ui-maximum: 180.00
ui-gamma: 1.00
ui-step-small: 1.00
ui-step-big: 10.00
ui-digits: 2
Magenta filter
Magenta filter compensation for the negative image
name: expM
type: double
default: 60.00
minimum: 0.00
maximum: 300.00
ui-minimum: 0.00
ui-maximum: 180.00
ui-gamma: 1.00
ui-step-small: 1.00
ui-step-big: 10.00
ui-digits: 2
Yellow filter
Yellow filter compensation for the negative image
name: expY
type: double
default: 60.00
minimum: 0.00
maximum: 300.00
ui-minimum: 0.00
ui-maximum: 180.00
ui-gamma: 1.00
ui-step-small: 1.00
ui-step-big: 10.00
ui-digits: 2
Clip base + fog
Clip base + fog to have a pure white output value
name: clip
type: boolean
default: True
Density boost
Boost paper density to take advantage of increased dynamic range of a monitor compared to a photographic paper
name: boost
type: double
default: 1.00
minimum: 0.25
maximum: 4.00
ui-minimum: 1.00
ui-maximum: 2.00
ui-gamma: 2.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
Contrast boost
Increase contrast for papers with fixed contrast (usually color papers)
name: contrast
type: double
default: 1.00
minimum: 0.25
maximum: 4.00
ui-minimum: 0.75
ui-maximum: 1.50
ui-gamma: 2.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
Dodge\/burn multiplier
The f-stop of dodge\/burn for pure white\/black auxiliary input
name: dodge
type: double
default: 1.00
minimum: -4.00
maximum: 4.00
ui-minimum: 0.00
ui-maximum: 2.00
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
Enable preflashing
Show preflash controls
name: preflash
type: boolean
default: False
Red preflash
Preflash the negative with red light to reduce contrast of the print
name: flashC
type: double
default: 0.00
minimum: 0.00
maximum: 1.00
ui-minimum: 0.00
ui-maximum: 1.00
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
visible:preflash
Green preflash
Preflash the negative with green light to reduce contrast of the print
name: flashM
type: double
default: 0.00
minimum: 0.00
maximum: 1.00
ui-minimum: 0.00
ui-maximum: 1.00
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
visible:preflash
Blue preflash
Preflash the negative with blue light to reduce contrast of the print
name: flashY
type: double
default: 0.00
minimum: 0.00
maximum: 1.00
ui-minimum: 0.00
ui-maximum: 1.00
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
visible:preflash
Illuminant adjustment
Show illuminant controls
name: illum
type: boolean
default: False
X multiplier
Adjust the X tristimulus value for output
name: illumX
type: double
default: 0.96
minimum: 0.70
maximum: 1.30
ui-minimum: 0.70
ui-maximum: 1.30
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
visible:illum
Z multiplier
Adjust the Z tristimulus value for output
name: illumZ
type: double
default: 0.83
minimum: 0.70
maximum: 1.30
ui-minimum: 0.70
ui-maximum: 1.30
ui-gamma: 1.00
ui-step-small: 0.00
ui-step-big: 0.10
ui-digits: 3
visible:illum
pads: aux input output
parent-class: GeglOperationPointComposer
categories: color
This page is part of the online GEGL Documentation, GEGL is a data flow based image processing library/framework, made to fuel GIMPs high-bit depth non-destructive editing future.