Package boofcv.alg.filter.binary

Class ThresholdNick_MT

java.lang.Object

boofcv.alg.filter.binary.ThresholdNick_MT

All Implemented Interfaces:

InputToBinary<GrayF32>

@Generated("boofcv.alg.filter.binary.ThresholdNick")
public class ThresholdNick_MT
extends Object
implements InputToBinary<GrayF32>

Based off the NICK algorithm described in [1] this is a thresholding algorithm intended for use on low quality ancient documents. A sliding windows approach is employed and is inspired by Niblack. It's designed to better handled "white" and ligh page images by shifting the threshold down.

[1] Khurshid, Khurram, et al. "Comparison of Niblack inspired Binarization methods for ancient documents." Document Recognition and Retrieval XVI. Vol. 7247. International Society for Optics and Photonics, 2009.

Constructor Summary

Constructors

Constructor	Description
ThresholdNick_MT(ConfigLength width, float k, boolean down)	Configures the algorithm.

Method Summary

Modifier and Type	Method	Description
ImageType<GrayF32>	getInputType()
float	getK()
ConfigLength	getWidth()
boolean	isDown()
void	process(GrayF32 input, GrayU8 output)	Converts the input image into a binary image.
void	setDown(boolean down)
void	setK(float k)
void	setWidth(ConfigLength width)

Methods inherited from class java.lang.Object

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

Constructor Details

ThresholdNick_MT

public ThresholdNick_MT(ConfigLength width,
 float k,
 boolean down)

Configures the algorithm.

Parameters:

width - size of local region. Try 31

k - The Niblack factor. Recommend -0.1 to -0.2

down - Threshold down or up

Method Details

process

public void process(GrayF32 input,
 GrayU8 output)

Converts the input image into a binary image.

Specified by:

process in interface InputToBinary<GrayF32>

Parameters:

input - Input image. Not modified.

output - Output binary image. Modified.

getInputType

public ImageType<GrayF32> getInputType()

Specified by:

getInputType in interface InputToBinary<GrayF32>

getK

public float getK()

setK

public void setK(float k)

getWidth

public ConfigLength getWidth()

setWidth

public void setWidth(ConfigLength width)

isDown

public boolean isDown()

setDown

public void setDown(boolean down)