mcib_plugins.processing

Class Thresholder

java.lang.Object

mcib_plugins.processing.Thresholder

public class Thresholder
extends java.lang.Object

Thresholds images.

Field Summary

Fields

Modifier and Type	Field and Description
Messenger	messenger The object used for message displaying.
Progressor	progressor The object used for progress displaying.

Constructor Summary

Constructors

Constructor and Description
Thresholder() Default constructor.

Method Summary

Modifier and Type	Method and Description
void	hard(Image image, double threshold) Applies hard thresholding to an image.
void	hysteresis(Image image, double low, double high) Applies hysteresis thresholding to an image.
void	hysteresisLowConnectivity(Image image, double low, double high)

Methods inherited from class java.lang.Object

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

Field Detail

messenger

public final Messenger messenger

The object used for message displaying.

progressor

public final Progressor progressor

The object used for progress displaying.

Constructor Detail

Thresholder

public Thresholder()

Default constructor.

Method Detail

hard

public void hard(Image image,
                 double threshold)

Applies hard thresholding to an image.

Parameters:

image - the input image to be thresholded. The image is overwritten with the thresholding results.

threshold - the threshold value. Elements with a value larger than or equal to threshold are set to 255, and elements with a value less than threshold are set to 0.

Throws:

java.lang.NullPointerException - if image is null.

hysteresis

public void hysteresis(Image image,
                       double low,
                       double high)

Applies hysteresis thresholding to an image.

Parameters:

image - the input image to be thresholded. The image is overwritten with the thresholding results.

low - high - the lower and higher threshold values that define the hysteresis. Elements with a value larger than or equal to high are set to 255, elements with a value less than low are set to 0, and elements with a value larger than or equal to the low are set to 255 only if they are connected to elements with a value larger than or equal to high through elements all with a value larger than or equal to low. If the size of the image in the z-dimension equals 1, this method uses 8-connectivity in x-y space, otherwise it uses 26-connectivity in x-y-z space. The algorithm is applied to every x-y(-z) subimage in a 5D image.

Throws:

java.lang.NullPointerException - if image image is null.

hysteresisLowConnectivity

public void hysteresisLowConnectivity(Image image,
                                      double low,
                                      double high)