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Module: | FoundationBasic |
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Segments an image into blobs by thresholding Difference of Gaussians.
Name | Type | Range | Description | |
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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 | RegionArray | Blobs extracted from the input image | ||
diagBlobAreas | IntegerArray | 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
Errors
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 |
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DomainError | Region exceeds an input image in ExtractBlobs_DoG. |
Complexity Level
This filter is available on Basic Complexity Level.
Filter Group
This filter is member of ExtractBlobs filter group.
See Also
- ExtractBlobs_Intensity – Segments an image into blobs by thresholding.
- ExtractBlobs_Dynamic – Segments an image into blobs by dynamic thresholding.
- ExtractBlobs_Color – Segments an image into blobs by color-based thresholding.