CavitySeeker

MLModule

genre	Morphology
status	stable
author	Stephan Zidowitz
package	MeVisLab/Standard
dll	MLBeam
definition	mlBeam.def
see also	Sprawl2D, ConstrainedConnectionCost
keywords	search, kernel, holes

Purpose

The module CavitySeeker searches for cavities in the image by exploiting a 2D-area around each voxel.

A cavity is defined as a dark area of limited size (mostly) surrounded by a wall of brighter voxels.

Usage

After selecting appropriate settings for the standard kernel type filter the performance of the CavitySeeker is adjusted by the fields Seek Algorithm, Boundary Level and Base Level.

Windows

Default Panel

Input Fields

input0

name: input0, type: Image

Output Fields

output0

name: output0, type: Image

A voxel mask with the identified cavities. The given values represents the level of trust.

Parameter Fields

Visible Fields

Seek Algorithm

name: seekAlgorithm, type: Enum, default: SeekSimple, deprecated name: SeekAlgorithm

Defines how to extend incomplete surrounded dark areas of the image.

Values:

Title	Name	Description
Simple	SeekSimple	Each radial path hitting a wall of the cavity is counted individually and the total sum is related to the sum of radial pathes.
Across	SeekAcross	The existence of a cavity wall is suggested only if hits are recorded at diametral points.
Composit	SeekComposit	A combination of both former criteria where the count of simple hits is qualified by the solidness of the wall.

Boundary Level

name: boundaryLevel, type: Double, default: 2, deprecated name: BoundaryLevel

Sets the value of potential cavity walls which are defined by image voxels with intensities above:

(Base Level + (Value of image at seek-location) * Boundary Level)

Base Level

name: baseLevel, type: Double, default: 0, deprecated name: BaseLevel

Sets the value of potential cavity walls which are defined by image voxels with intensities above:

(Base Level + (Value of image at seek-location) * Boundary Level)