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ErodeRegion
Performs a morphological erosion on a region using a predefined kernel.
| Name | Type | Range | Description | |
|---|---|---|---|---|
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inRegion | Region | Input region | |
|
inKernel | KernelShape | Kernel shape (predefined) | |
|
inRadiusX | Integer | 0 -  |
Nearly half of the kernel's width (2*R+1) |
|
inRadiusY | Integer* | 0 - |
Nearly half of the kernel's height (2*R+1), or same as inRadiusX |
 |
outRegion | Region | Output region | |
Applications
Description
The operation performs a morphological erosion, which is a basic tool used for region shrinking. Similarly to other region morphology operations, erosion is conducted using a shape called kernel (or structuring element). The kernel is repeatedly centered at each location within the dimensions of the input region. Then, pixel location L is added to the resulting region if and only if all of the input region pixels lies inside the kernel centered at this (L) location.
The input parameter inKernel allows to choose the shape of a kernel, while parameters inRadiusX, inRadiusY allow to determine its dimensions. For instance:
- inKernel = Ellipse together with inRadiusX = inRadiusY results in shrinking performed equally in all directions.
- Setting inRadiusX to higher value than inRadiusY results in shrinking performed more significantly along horizontal axis.
Hints
- Increase inRadiusX to make the output region thinner.
- Change inKernel to Ellipse to make the filter work equally strongly in each direction (execution will be slower).
Examples
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ErodeRegion run with inKernel = Ellipse of dimensions inRadiusX = 3, inRadiusY = 3.
Errors
This filter can throw an exception to report error. Read how to deal with errors here: Error Handling
| Error type | Description |
|---|---|
| DomainError | Unsupported kernel in ErodeRegion. |
Complexity Level
This filter is available on Basic Complexity Level.
Filter Group
This filters is member of ErodeRegion filter group.
