Pena Contents
Introduction
Control Pane
Brush Pane
Texture Pane
Effects Pane
Color Picker
Save/Load Pane
Selection Pane
Preferences Pane
Intelligent Canvas
Wacom Bluetooth Stylus
Jot Bluetooth Stylus
 
The Effects Library
Effects Introduction
Color Source Effects
Procedural Source Effects
Color Filter Effects
Spatial Filter Effects
Math and Logic Effects
  • Math and Logic Introduction
  • Clock Limiter
  • Clock Reset
  • Color Add 1+2
  • Color Burn
  • Color Difference
  • Color Dodge
  • Color Exclusion
  • Color Hard Light
  • Color Multiply 1x2
  • Color Overlay
  • Color Restore
  • Color Save
  • Color Screen
  • Color Soft Light
  • Color Subtract 1-2
  • Color Subtract 2-1
  • Special Effects
     
    Artists Gallery
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    Pena Support
    Troubleshooting

       

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      Effect:Color Difference
      Category:Math and Logic
      Speed:Fast

      Description: The Color Burn Effect produces a traditional photographic Difference effect.

      The Difference Effect subtracts Color 2 from Color 1, or the other way round, to always get a positive value. Differencing with black produces no change. Differencing with white inverts the picture.

       
      Options: The Color Difference Effect has the following Options Pane:

      Difference Red:If set to a Red X, the Red Channel is not Differenced. If set to a Green Check Mark the Red Channel of Color 2 is Differenced to the Red Channel of Color 1.
      Difference Green:If set to a Red X, the Green Channel is not Differenced. If set to a Green Check Mark the Green Channel of Color 2 is Differenced to the Green Channel of Color 1.
      Difference Blue:If set to a Red X, the Blue Channel is not Differenced. If set to a Green Check Mark the Blue Channel of Color 2 is Differenced to the Blue Channel of Color 1.
      Difference Alpha:If set to a Red X, the Alpha Channel is not Differenced. If set to a Green Check Mark the Alpha Channel of Color 2 is Differenced to the Alpha Channel of Color 1.
      Inverse:If set to a Red X, a normal Difference is produced. If set to a Green Check Mark the Difference is inverted (subtracted from white).
      Output Color 1:By default this is set to REPLACE which means that the set color will be output to Color 1. You can change this as explained in Options Pane Color Mixers.
      Output Color 2:By default this is set to IGNORE which means that the Color 2 will be ignored (the original Color 2 will be kept). You can change this as explained in Options Pane Color Mixers.

      Example: The following images show the Color Difference Effect.

      Our first example combines three Effects. In Slot 1 we have a Texture Effect with our Arches National Park photo loaded. In Slot 2 we have a 2-Color Gradient with default values but Output Color 1 set to Ignore and Output Color 2 set to Replace:

      In Slot 3 we place our Color Difference with default values. This is the result:

      Our example image also combines three Effects. In Slot 1 we again have a Texture Effect with our Arches National Park photo loaded. In Slot 2 we have a Fiery Inferno with default values but Output Color 1 set to Ignore and Output Color 2 set to Replace:

      In Slot 3 we place our Color Difference with default values. This is the result:

       

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