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RegionHitAndMissTransform

Header:	AVL.h
Namespace:	avl
Module:	FoundationBasic

Performs a hit-and-miss transformation on a region using arbitrary kernels.

Syntax

void avl::RegionHitAndMissTransform
(
	const avl::Region& inRegion,
	const avl::Region& inHitKernel,
	atl::Optional<const avl::Location&> inHitKernelAnchor,
	const avl::Region& inMissKernel,
	atl::Optional<const avl::Location&> inMissKernelAnchor,
	avl::Region& outRegion
)

Parameters

Name	Type	Default	Description
inRegion	const Region&		Input region
inHitKernel	const Region&		The kernel of pixels that should be present
inHitKernelAnchor	Optional<const Location&>	NIL	Location withing inHitKernel, defining its center
inMissKernel	const Region&		The kernel of pixels that should be missing
inMissKernelAnchor	Optional<const Location&>	NIL	Location withing inMissKernel, defining its center
outRegion	Region&		Output region

Description

The operation performs a hit-and-miss transformation. Similarly to other region morphology operations, hit-and-miss is conducted using a shape called kernel (or structuring element). In this particular case, there are two kernels: inHitKernel and inMissKernel. Both of them are repeatedly centered at each location within the dimensions of the input region. Then, pixel location L is added to the resulting region if and only if all of the inHitKernel pixels centered at L lie inside and all of the inMissKernel pixels centered at L lie outside the input region.

Examples

RegionHitAndMissTransform run with kernels \( \begin{bmatrix} 1 & X & X\\ 1 & 0 & X\\ 1 & X & X \end{bmatrix} \) where \( 1 \)'s represent pixels from inHitKernel, \( 0 \)'s from inMissKernel and \( X \)'s the other ones.

Errors

List of possible exceptions: