volume
Class LoG

java.lang.Object
  |
  +--volume.Kernel
        |
        +--volume.Kernel2D
              |
              +--volume.LoG

public class LoG

extends Kernel2D

This is a 2D Laplacian of Gaussian convolution kernel. LoG(x,y) = - 1 / (PI sigma^4) [1 - (x^2 + y^2) / 2 sigma^2] e ^ (-((x^2 + y^2)/2 sigma^2)))

Fields inherited from class volume.Kernel2D

k

Fields inherited from class volume.Kernel

halfwidth

Constructor Summary

LoG(double sigma)
Create a Laplacian of Gaussian kernel from standard deviation sigma.

Method Summary

protected double	function(double x, double y) Compute Laplacian of Gaussian function at x,y.
double	getSigma()
java.lang.String	toString()

Methods inherited from class volume.Kernel2D

kernelToString

Methods inherited from class volume.Kernel

support

Methods inherited from class java.lang.Object

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

Constructor Detail

LoG

public LoG(double sigma)

Create a Laplacian of Gaussian kernel from standard deviation sigma.

Parameters:

sigma, - the standard deviation of the associated probability function of the Gaussian function.

Method Detail

getSigma

public double getSigma()

function

protected double function(double x,
                          double y)

Compute Laplacian of Gaussian function at x,y.

toString

public java.lang.String toString()

Overrides:

toString in class Kernel