ExtractBlobs_DoG

Module:	FoundationBasic

Segments an image into blobs by thresholding Difference of Gaussians.

Name	Type	Range	Description
inImage	Image		Image from which blobs are extracted
inRoi	ShapeRegion *		Range of pixels to be processed
inRoiAlignment	CoordinateSystem2D *		Adjusts the region
inStdDev	Real	0.0 -	Smoothing standard deviation for the smaller Gaussian kernel
inStdDevRatio	Real	1.0 -	Defines how many times larger is the second Gaussian kernel
inKernelRelativeSize	Real	0.0 - 3.0	A multiple of the standard deviation determining the size of the Gaussian kernel
inThresholdParams	IntensityThresholdParams		Parameters for thresholding an image
inRegionProcessingParams	RegionProcessingParams		Parameters for opening and closing of a region
inBlobSplittingParams	BlobSplittingParams		Parameters for splitting region into blobs
outBlobs	Region Array		Blobs extracted from the input image
diagBlobAreas	Integer Array		Areas of extracted blobs
diagBaseRegion	Region		Region of pixels right after thresholding

This filter can be used to quickly segment an image by thresholding Difference of Gaussians. It performs a series of operations on inImage:

Difference of Gaussians is computed by DifferenceOfGaussians
Difference of Gaussians is thresholded by ThresholdToRegion using parameters from inThresholdParams
resulting region is opened and then closed by OpenRegion and CloseRegion using parameters from inRegionProcessingParams
resulting region is split into blobs by SplitRegionIntoBlobs using parameters from inBlobSplittingParams

ExtractBlobs_DoG performed on the sample image with inStdDev = 6.0 and inThresholdParams.MaxIntensity = -4.0.

This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

List of possible exceptions:

Error type	Description
DomainError	Region exceeds an input image in ExtractBlobs_DoG.

This filter is available on Basic Complexity Level.

This filter is member of ExtractBlobs filter group.