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SegmentImage_Gray_Tiled

Header:	AVL.h
Namespace:	avl
Module:	FoundationPro

Segments an image into blobs examining differences between pixels values, first pass is tiled.

Applications: Detection of objects of undefined shape, but characterized by uniform brightness and good contrast to the background.

Syntax

void avl::SegmentImage_Gray_Tiled
(
	const avl::Image& inImage,
	atl::Optional<const avl::Region&> inRoi,
	avl::BlobMergingMethod::Type inMergingMethod,
	avl::RegionConnectivity::Type inConnectivity,
	int inMaxDifference,
	int inHysteresis,
	bool inTonalDrift,
	bool inDirectional,
	int inMinArea,
	atl::Optional<int> inMaxArea,
	atl::Array<avl::Region>& outBlobs
)

Parameters

Name	Type	Range	Default	Description
inImage	const Image&			Input image
inRoi	Optional<const Region&>		NIL	Range of pixels to be processed
inMergingMethod	BlobMergingMethod::Type		Neighbor	Defines a criterion by which two pixels can be merged into one blob
inConnectivity	RegionConnectivity::Type
inMaxDifference	int	0 -	5	Maximal tonal difference that allows two pixels to be merged into one blob
inHysteresis	int			Change of MaxDifference between first and second iteration
inTonalDrift	bool		True	When 'True' blobs can be merged even if the illumination is not even
inDirectional	bool			When 'True' the filter can segment results of GradientDirAndPresenceImage
inMinArea	int	0 -	20	Minimal area of a blob that may be accepted
inMaxArea	Optional<int>		NIL	Minimal area of a blob that may be accepted
outBlobs	Array<Region>&

Requirements

For input inImage only pixel formats are supported: 1⨯uint8, 3⨯uint8.

Read more about pixel formats in Image documentation.

Description

The filter segments the inImage image in two phases. In the first step segmentation is done within tiles, while in the second step blobs are merged between consecutive tiles.

Errors

List of possible exceptions: