Module imagingbook.common

Package imagingbook.common.threshold.adaptive

Class SauvolaThresholder

java.lang.Object

imagingbook.common.threshold.adaptive.SauvolaThresholder

All Implemented Interfaces:

AdaptiveThresholder, Thresholder

public class SauvolaThresholder
extends Object
implements AdaptiveThresholder

This is an implementation of the adaptive thresholder proposed in [1]. See also Sec. 9.2 (Eq. 9.74) of [2].

[1] Adaptive thresholder as proposed in J. Sauvola and M. Pietikäinen, "Adaptive document image binarization", Pattern Recognition 33(2), 1135-1143 (2000).
[2] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction 3rd ed, Springer (2022).

Version:

2022/08/01

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SauvolaThresholder.Parameters	Parameters for class SauvolaThresholder.

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

Thresholder.BackgroundMode

Constructor Summary

Constructors

Constructor	Description
SauvolaThresholder()
SauvolaThresholder(SauvolaThresholder.Parameters params)

Method Summary

Modifier and Type	Method	Description
FloatProcessor	getThreshold(ByteProcessor I)	Calculates a adaptive "threshold surface" for the specified ByteProcessor and returns it as another ByteProcessor.

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.adaptive.AdaptiveThresholder

threshold, threshold, threshold

Constructor Details

SauvolaThresholder

public SauvolaThresholder()

SauvolaThresholder

public SauvolaThresholder(SauvolaThresholder.Parameters params)

Method Details

getThreshold

public FloatProcessor getThreshold(ByteProcessor I)

Description copied from interface: AdaptiveThresholder

Calculates a adaptive "threshold surface" for the specified ByteProcessor and returns it as another ByteProcessor.

Specified by:

getThreshold in interface AdaptiveThresholder

Parameters:

I - the input image

Returns:

the threshold surface