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ExtractBlobs_DoG
Segments an image into blobs by thresholding Difference of Gaussians.
Header: | AVL.h |
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Syntax
C++
C#
void avl::ExtractBlobs_DoG ( const avl::Image& inImage, atl::Optional<const avl::Region&> inRoi, float inStdDev, float inStdDevRatio, float inKernelRelativeSize, const avl::IntensityThresholdParams& inThresholdParams, const avl::RegionProcessingParams& inRegionProcessingParams, const avl::BlobSplittingParams& inBlobSplittingParams, atl::Array<avl::Region>& outBlobs, atl::Array<int>& diagBlobAreas, avl::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:
- 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
Examples
See Also
- ExtractBlobs_Color – Segments an image into blobs by color-based thresholding.
- ExtractBlobs_Dynamic – Segments an image into blobs by dynamic thresholding.
- ExtractBlobs_Intensity – Segments an image into blobs by thresholding.