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# RegionUnion

Computes a region containing pixels from both input regions.

### Syntax

void avl::RegionUnion
(
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 union of two given regions. That is, the resulting region contains pixel locations that belong to one or both of the given regions. Both dimensions (width and height) of the resulting region are set to the maximum of corresponding dimensions of the input regions.

### Examples

RegionUnion run on the sample regions.

### Errors

List of possible exceptions:

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