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If you want to document Blender 2.5 features please edit pages under Doc:2.5/Manual.
If a "2.5" page doesn't exist please copy the text from 2.4x Manual and edit the new page (i.e. you should paste the wikitext from this 2.4x page to this new 2.5x page and then update the latter with 2.5 features)


Manual - Blender 2.44

[edit] Filter Node

Panel: Node Editor → Node Composition

Menu: ⇧ ShiftA → Filters → Filter

Filter node
The Filter node implements various common image enhancement filters. The supported filters are, if not obvious, named after the mathematical genius who came up with them:
  • Soften - Slightly blurs the image.
  • Sharpen - Increases the contrast, especially at edges
  • Laplace - Softens around edges
  • Sobel - Creates a negative image that highlights edges
  • Prewitt - Tries to do Sobel one better.
  • Kirsch - Improves on the work done by those other two flunkies, giving a better blending as you approach an edge.
  • Shadow - Performs a relief emboss/bumpmap effect, darkening outside edges.
The Filter node has seven modes, shown here.
The Soften, Laplace, Sobel, Prewitt and Kirsch all perform edge-detection (in slightly different ways) based on vector calculus and set theory equations that would fill six blackboards with gobbledy gook. Recommended reading for insomniacs.




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