Roberts

MLModule

genre	Kernel
status	stable
authors	Regina Ochotzki, Lars Bornemann
package	MeVisLab/Standard
dll	MLKernel
definition	MLKernel.def
see also	ExtendedConvolution, Compass, Convolution, KernelExample, TextureFilter, LoG, Morphology, BitMorphology
keywords	filter, Roberts, Cross, edge, detection

Purpose

The module Roberts implements different variations of the Roberts filter.

Windows

Default Panel

Input Fields

input0

name: input0, type: Image

Output Fields

output0

name: output0, type: Image

Parameter Fields

Field Index

Border Handling: Enum

Fill Value: Double

Max: Double

Min: Double

referenceExtentMode: Enum

Roberts Operator: Enum

Use: Bool

Visible Fields

Border Handling

name: borderHandling, type: Enum, default: PadSrcClamp, deprecated name: edgeMode

Defines the border handling mode.

See Border Handling in Kernel Operations for details.

Values:

Title	Name
No Pad	NoPad
Pad Src Fill	PadSrcFill
Pad Dst Fill	PadDstFill
Pad Dst Fill With Orig	PadDstFillWithOrig
Pad Src Undefined	PadSrcUndefined
Pad Dst Undefined	PadDstUndefined
Pad Src Clamp	PadSrcClamp

Fill Value

name: fillValue, type: Double, default: 0

Sets the fill value for certain Border Handling modes.

Roberts Operator

name: robertsOperator, type: Enum, default: Roberts2 (square)

Defines the filter mode.

Values:

Title	Name	Description
Roberts2 (one direction - x)	Roberts2 (one direction - x)	Roberts Cross in only one direction (x) with: 1 0 0 -1
Roberts2 (one direction - y)	Roberts2 (one direction - y)	Roberts Cross in only one direction (y) with: 0 -1 1 0
Roberts2 (standard)	Roberts2 (standard)	Standard Roberts Cross with: 1 -1 1 -1
Roberts2 (absolute values)	Roberts2 (absolute values)	Roberts Cross. Let (a,b,c,d) be the voxel values below the following kernel: a b c d The result voxel is abs(a-d) + abs(c-b)
Roberts2 (square)	Roberts2 (square)	Roberts Cross. Let (a,b,c,d) be the voxel values below the following kernel: a b c d The result voxel is sqrt((a-d)*(a-d) + (c-b)*(c-b))
Roberts6 (absolute values)	Roberts6 (absolute values)	Roberts Cross like Roberts2, but using all 6 pairwise differences: Let (a,b,c,d) be the voxel values below the following kernel: a b c d The result voxel is 1.0f/3.0f * (abs(a-d) + abs(c-b) + abs(a-b) + abs(a-c) + abs(b-d) + abs(c-d))
Roberts6 (square)	Roberts6 (square)	Roberts Cross like Robert2, but using all 6 pairwise differences. Let (a,b,c,d) be the voxel values below the following kernel: a b c d The result voxel is 1.0f/3.0f * sqrt((a-d)*(a-d) + (c-b)*(c-b) + (a-b)*(a-b) + (a-c)*(a-c) + (b-d)*(b-d) + (c-d)*(c-d))

Min

name: intervalMinOfFilteredVoxels, type: Double, default: 0, deprecated name: imageIntervalMin

Sets the minimum value threshold for outputting a subset of voxel.

Max

name: intervalMaxOfFilteredVoxels, type: Double, default: 1024, deprecated name: imageIntervalMax

Sets the maximum value threshold for outputting a subset of voxel.

Use

name: useIntervalOfFilteredVoxels, type: Bool, default: FALSE, deprecated name: useImageInterval

If checked, the module outputs only on a subset of voxels defined by a value range.

Hidden Fields

referenceExtentMode

name: referenceExtentMode, type: Enum, default: Overlap

Values:

Title	Name
Overlap	Overlap
Input0 Ext Without Fill	Input0_ExtWithoutFill
Input0 Ext With Fill	Input0_ExtWithFill
Max Extents Without Fill	MaxExtentsWithoutFill
Max Extents With Fill	MaxExtentsWithFill