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# RegionDifference

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

### Syntax

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


### Parameters

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

### Description

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.

### Examples

 Sample region inRegion1 Sample region inRegion2 RegionDifference(inRegion1, inRegion2) RegionDifference(inRegion2, inRegion1)

### Errors

List of possible exceptions:

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