Module: Auto Thresholding / Auto Segment 3 Phases ()

Description:

Auto Segment 3 Phases is one of the configurations of the module Auto Thresholding. For other configurations, see the port Type.

This module computes a 2-level threshold based on the specified mode of Entropy, Factorization or Moments without prompting the user for input (see Auto Threshold High description).

The output is a label image with 2 non-zero levels. The computed thresholds also are displayed in the Tables Panel.

See also: Adaptive Thresholding.

Connections:

Input Image [required]
The image to be thresholded. Supported types include: Grayscale images except float (Uniform Scalar Field).

Ports:

Type

This port allows selecting the configuration of this module. The available configurations are:

• Auto Segment 3 Phases,
• Auto Threshold High,
• Auto Threshold Low.

Interpretation

This port specifies whether the input will be interpreted as a 3D volume or a stack of 2D images for processing.

• "3D": the module configuration is set to 3D. The image will be processed as a whole in 3D.
• "XY planes": the module configuration is set to 2D. The image will be processed slice by slice.

Input Range

This port defines the low and high threshold levels.

Criterion

This option refers to the measure of dispersion used in the algorithm. The variance yields better results in most cases.
Entropy: Entropy of the intensity distribution.
Factorisation: Variance of the intensity distribution.
Moments: Moments of the intensity distribution.