ImageScience 3.0.0

imagescience.feature
Class Laplacian

java.lang.Object
  extended by imagescience.feature.Laplacian

public class Laplacian
extends java.lang.Object

Computes the Laplacian of images.


Field Summary
 Differentiator differentiator
          The object used for image differentiation.
 Messenger messenger
          The object used for message displaying.
 Progressor progressor
          The object used for progress displaying.
 
Constructor Summary
Laplacian()
          Default constructor.
 
Method Summary
 Image run(Image image, double scale)
          Computes the Laplacian of images.
 
Methods inherited from class java.lang.Object
equals, 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.


differentiator

public final Differentiator differentiator
The object used for image differentiation.

Constructor Detail

Laplacian

public Laplacian()
Default constructor.

Method Detail

run

public Image run(Image image,
                 double scale)
Computes the Laplacian of images.

Parameters:
image - The input image for which the Laplacian needs to be computed. If it is of type FloatImage, it will be used to store intermediate results. Otherwise it will be left unaltered. If the size of the image in the z-dimension equals 1, this method will compute, for every image element, the two-dimensional (2D) Laplacian. Otherwise it will compute for every image element the full three-dimensional (3D) Laplacian. These computations are performed on every x-y(-z) subimage in a 5D image.
scale - The smoothing scale at which the required image derivatives are computed. The scale is equal to the standard deviation of the Gaussian kernel used for differentiation and must be larger than 0. In order to enforce physical isotropy, for each dimension, the scale is divided by the size of the image elements (aspect ratio) in that dimension.
Returns:
An image showing the Laplacian of the input image. The returned image is always of type FloatImage.
Throws:
java.lang.IllegalArgumentException - If scale is less than or equal to 0.
java.lang.IllegalStateException - If the size of the image elements (aspect ratio) is less than or equal to 0 in the x-, y-, or z-dimension.
java.lang.NullPointerException - If image is null.

ImageScience 3.0.0

Copyright (C) Erik Meijering. Permission to use this software and corresponding documentation for educational, research, and not-for-profit purposes, without a fee and without a signed licensing agreement, is granted, subject to the following terms and conditions.

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