Diffusion¶

MLModule¶

genre	`Diffusion`
author	`MeVis Medical Solutions AG`
package	`MeVisLab/Standard`
dll	`MLDiffusion1`
definition	MLDiffusion1.def
keywords	`nonlinear`, `filter`, `perona-malik`, `weickert`, `aos`

Purpose¶

The module Diffusion implements the isotropic diffusion process in 2D using a semi-implicit AOS (Additive Operator Splitting) scheme.

For a 3D image, the diffusion is applied slice-wise.

Windows¶

Default Panel¶

../../../Modules/ML/MLDiffusion1/mhelp/Images/Screenshots/Diffusion._default.png

Input Fields¶

input0¶

name: input0, type: Image¶

Output Fields¶

output0¶

name: output0, type: Image¶

Parameter Fields¶

Field Index¶

Apply: Trigger

Diffusion Function: Enum

Edge Parameter: Float

Number of Iterations: Integer

Smoothing: Float

Status: String

Time Step Size: Float

Update Mode: Enum

Visible Fields¶

Update Mode¶

name: updateMode, type: Enum, default: AutoUpdate¶: Defines how the module should react on (input) field changes.

Values:

Title	Name	Description
Off	Off	The module does nothing on field changes.
Auto Update	AutoUpdate	The module computes a new output image on any field change.

Apply¶

name: apply, type: Trigger¶: When pressed, the output image is computed anew.

Status¶

name: status, type: String, persistent: no¶: Shows the status of the module.

Time Step Size¶

name: timeStepSize, type: Float, default: 5, minimum: 0, maximum: 200¶

Sets the time step size for approximation.

The smaller the step, the better the result.

Number of Iterations¶

name: numOfSteps, type: Integer, default: 10, minimum: 0, maximum: 200¶

Sets the number of iteration for the diffusion.

The higher the value, the longer the diffusion time.

Edge Parameter¶

name: edgeParameter, type: Float, default: 3, minimum: 1e-05, maximum: 200¶: Sets a value used to detect edges in the diffusivity function.

Smoothing¶

name: smoothing, type: Float, default: 1, minimum: 0, maximum: 20¶: Sets the amount of Gaussian smoothing of the current image to calculate the diffusion values.

Diffusion Function¶

name: diffusionFunction, type: Enum, default: Perona-Malik¶: Defines the diffusion function.