OtsuThreshold

MLModule

genre	Segmentation
author	MeVis Medical Solutions AG
package	MeVisLab/Standard
dll	MLSegmentation
definition	MLSegmentation.def
keywords	segmentation, threshold

Purpose

The module OtsuThreshold automatically computes a threshold according to Otsu and segments the image into 0 (lower than the threshold) and 1 (greater than the threshold).

A background threshold value can be set to let the module work only on a mask.

Details

See:

N. Otsu, A Threshold Selection Methods from Gray-Level Histograms,
IEEE Trans. Systems, Man and Cybernetics, 1979, Vol. 9, 62--66

Tips

Does only work with unsigned int 16 data type as input.

Windows

Default Panel

Input Fields

input0

name: input0, type: Image

Input will be converted internally to unsigned int 16 for the histogram computation.

Output Fields

output0

name: output0, type: Image

Output is a binary segmentation of the image according to the computed threshold. Output image has unsigned int 16 data type.

Parameter Fields

Field Index

Apply: Trigger

Auto Apply: Bool

Background Threshold: Integer

Bin Size: Integer

Threshold:: Integer

Visible Fields

Bin Size

name: binSize, type: Integer, default: 128

Sets the number of bins used internally for histogram computation.

Apply

name: apply, type: Trigger

When pressed, the module computes anew.

Auto Apply

name: autoApply, type: Bool, default: FALSE

If checked, the module computes anew on each field change.

Background Threshold

name: backgroundThreshold, type: Integer, default: -1

Sets a threshold for suppressing background values.

If this is set to a value < 0, this threshold has no effect (since the module only works on unsigned integer images).

Threshold:

name: threshold, type: Integer, default: 0

Shows the automatically computed threshold for the Otsu segmentation.