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RegionBoundaries
Removes interior pixels from a region.
Header: | AVL.h |
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Syntax
C++
C#
void avl::RegionBoundaries ( const avl::Region& inRegion, avl::RegionConnectivity::Type inConnectivity, avl::Region& outRegion )
Parameters
Name | Type | Default | Description | |
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inRegion | const Region& | Input region | ||
inConnectivity | RegionConnectivity::Type | Type of connectivity used for the region foreground | ||
outRegion | Region& | Output region |
Description
The operation removes all internal pixels from the region (thus leaving only the boundary pixels). The definition of internal pixel depends on the inConnectivity value:
- If inConnectivity is set to Four directions, internal pixels are those having neighbours in all four major directions (up, down, left, right) also contained in the region
- If inConnectivity is set to Eight directions, internal pixels are those having neighbours in all eight directions (four major + four diagonal) also contained in the region
Examples
See Also
- RegionContours – Computes an array of closed paths corresponding to the contours of the input region.
- RegionInteriors – Removes boundary pixels from a region.