MorphologicalGradient

MacroModule

genre	Filters
author	MeVis Medical Solutions AG
package	MeVisLab/Standard
definition	Filters.def
see also	Morphology
keywords	morphology, dilation, erosion, erode, dilate, edge

Purpose

The module MorphologicalGradient is a simple edge detection filter based on a combination of a dilation and an erosion of the input image.

Windows

Default Panel

Input Fields

imageIn

name: imageIn, type: Image

Output Fields

imageOut

name: imageOut, type: Image

Parameter Fields

Field Index

Dilation Size: Integer

Erosion Size: Integer

Gradient Type: Enum

Use 3D: Bool

Use spherical kernel: Bool

Visible Fields

Dilation Size

name: dilationSize, type: Integer, default: 3, minimum: 1

Sets the size of the dilation kernel.

Erosion Size

name: erosionSize, type: Integer, default: 3, minimum: 1

Sets the size of the erosion kernel.

Use spherical kernel

name: sphericalKernel, type: Bool, default: FALSE

If checked, a spherical kernel is used instead of a square kernel.

Use 3D

name: threeDimensional, type: Bool, default: FALSE

If checked, the module uses a 3D kernel instead of a 2D kernel.

Gradient Type

name: gradientType, type: Enum, default: Central

Defines the order in which dilation and erosion are performed.

The following symbols are used:

Symbol	Meaning
I	Image
⊕	Dilation
⊖	Erosion
B	Structuring Element (Kernel)

Values:

Title	Name	Description
​Central	​Central	​| (I ⊕ B) - (I ⊖ B) |
​Outer	​Outer	​| (I ⊕ B) - ((I ⊕ B) ⊖ B) |
​Inner	​Inner	​| ((I ⊖ B) ⊕ B) - (I ⊖ B) |