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Computes a region containing pixels from the first input region, but not from the second input region.


void avl::RegionDifference
	const avl::Region& inRegion1,
	const avl::Region& inRegion2,
	avl::Region& outRegion


Name Type Default Description
inRegion1 const Region& First input region
inRegion2 const Region& Second input region
outRegion Region& Output region


The operation computes the logical difference of two given regions. That is, the resulting region contains pixel locations that belong to the first input region but do not belong to the second one. Both dimensions (width and height) of the resulting region are set to the corresponding dimensions of the first input region.


Sample region inRegion1

Sample region inRegion2

RegionDifference(inRegion1, inRegion2)

RegionDifference(inRegion2, inRegion1)


Error type Description
DomainError Input and output regions are not distinct in RegionDifference.

See Also