Package boofcv.alg.filter.binary

Class ThresholdLocalOtsu

java.lang.Object

boofcv.alg.filter.binary.ThresholdLocalOtsu

All Implemented Interfaces:

InputToBinary<GrayU8>

Direct Known Subclasses:

ThresholdLocalOtsu_MT

public class ThresholdLocalOtsu
extends Object
implements InputToBinary<GrayU8>

Local Otsu thresholding where each pixel is thresholded by computing the GThresholdImageOps.computeOtsu2(int[], int, int) Otsu-2} using its local region This implementation includes a modification from the traditional Otsu algorithm. The threshold can optionally be adjusted in low variance regions. See code for details.

See Also:

• GThresholdImageOps.computeOtsu2(ImageGray, int, int)

Constructor Summary

Constructors

Constructor	Description
ThresholdLocalOtsu(boolean otsu2, ConfigLength regionWidthLength, double tuning, double scale, boolean down)	Configures the detector

Method Summary

Modifier and Type	Method	Description
ImageType<GrayU8>	getInputType()
void	process(GrayU8 input, GrayU8 output)	Converts the gray scale input image into a binary image
protected void	process(GrayU8 input, GrayU8 output, int x0, int y0, int x1, int y1, byte a, byte b)

Methods inherited from class java.lang.Object

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

Constructor Details

ThresholdLocalOtsu

public ThresholdLocalOtsu(boolean otsu2,
 ConfigLength regionWidthLength,
 double tuning,
 double scale,
 boolean down)

Configures the detector

Parameters:

regionWidthLength - How wide the local square region is.

tuning - Tuning parameter. 0 = standard Otsu. Greater than 0 will penalize zero texture.

Method Details

process

public void process(GrayU8 input,
 GrayU8 output)

Converts the gray scale input image into a binary image

Specified by:

process in interface InputToBinary<GrayU8>

Parameters:

input - Input image

output - Output binary image

process

protected void process(GrayU8 input,
 GrayU8 output,
 int x0,
 int y0,
 int x1,
 int y1,
 byte a,
 byte b)

getInputType

public ImageType<GrayU8> getInputType()

Specified by:

getInputType in interface InputToBinary<GrayU8>