Back to FabImage Library website

You are here: Start » Function Reference » Image Segmentation » ExtractBlobs_DoG

ExtractBlobs_DoG


Header:FIL.h
Namespace:fil

Segments an image into blobs by thresholding Difference of Gaussians.

Syntax

C++
C#
 
void fil::ExtractBlobs_DoG
(
	const fil::Image& inImage,
	ftl::Optional<const fil::Region&> inRoi,
	float inStdDev,
	float inStdDevRatio,
	float inKernelRelativeSize,
	const fil::IntensityThresholdParams& inThresholdParams,
	const fil::RegionProcessingParams& inRegionProcessingParams,
	const fil::BlobSplittingParams& inBlobSplittingParams,
	ftl::Array<fil::Region>& outBlobs,
	ftl::Array<int>& diagBlobAreas,
	fil::Region& diagBaseRegion
)

Parameters

Name Type Range Default Description
inImage const Image& Image from which blobs are extracted
inRoi Optional<const Region&> NIL Range of pixels to be processed
inStdDev float 0.0 - 3.0f Smoothing standard deviation for the smaller Gaussian kernel
inStdDevRatio float 1.0 - 1.6f Defines how many times larger is the second Gaussian kernel
inKernelRelativeSize float 0.0 - 3.0 3.0f A multiple of the standard deviation determining the size of the Gaussian kernel
inThresholdParams const IntensityThresholdParams& Parameters for thresholding an image
inRegionProcessingParams const RegionProcessingParams& Parameters for opening and closing of a region
inBlobSplittingParams const BlobSplittingParams& Parameters for splitting region into blobs
outBlobs Array<Region>& Blobs extracted from the input image
diagBlobAreas Array<int>& Areas of extracted blobs
diagBaseRegion Region& Region of pixels right after thresholding

Description

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

Examples

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

See Also