Module imagingbook.common

Package imagingbook.common.threshold.global

Class IsodataThresholder

java.lang.Object

imagingbook.common.threshold.global.IsodataThresholder

All Implemented Interfaces:

GlobalThresholder, Thresholder

public class IsodataThresholder
extends Object
implements GlobalThresholder

This is an implementation of the global thresholder proposed by Ridler and Calvard [1]. See Sec. 9.1.3 (Alg. 9.3) of [2] for a detailed description.

[1] T.W. Ridler, S. Calvard, Picture thresholding using an iterative selection method, IEEE Transactions on Systems, Man and Cybernetics, SMC-8 (August 1978) 630-632.
[2] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction, 3rd ed, Springer (2022).

Version:

2022/04/02

Nested Class Summary

Nested classes/interfaces inherited from interface imagingbook.common.threshold.Thresholder

Thresholder.BackgroundMode

Field Summary

Fields inherited from interface imagingbook.common.threshold.global.GlobalThresholder

NoThreshold

Constructor Summary

Constructors

Constructor	Description
IsodataThresholder()

Method Summary

Modifier and Type	Method	Description
float	getThreshold(int[] h)	Returns a single (global) threshold value for the specified histogram.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface imagingbook.common.threshold.global.GlobalThresholder

getThreshold, threshold

Constructor Details

IsodataThresholder

public IsodataThresholder()

Method Details

getThreshold

public float getThreshold(int[] h)

Description copied from interface: GlobalThresholder

Returns a single (global) threshold value for the specified histogram.

Specified by:

getThreshold in interface GlobalThresholder

Parameters:

h - a histogram (array of frequencies)

Returns:

a single (global) threshold value