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Standalone View
manual/composite_nodes/types/filter/filter_node.rst
| .. TODO/Review: {{review|copy=X}} . | |||||
| Filter Node | |||||
| =========== | |||||
| .. figure:: /images/Tutorials-NTR-ComFilter.jpg | |||||
| 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. | |||||
| .. figure:: /images/Tutorials-NTR-ComFilterNodeIllustration.jpg | |||||
| :width: 500px | |||||
| :figwidth: 500px | |||||
| 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. | |||||
| No newline at end of file | |||||