volume
Class DoG2D

java.lang.Object
  |
  +--volume.Kernel
        |
        +--volume.Kernel2D
              |
              +--volume.Gaussian2D
                    |
                    +--volume.DoG2D

public class DoG2D

extends Gaussian2D

This is a 2D Difference of Gaussian convolution kernel. DoG2D(x) = 1 / Math.sqrt(2 Math.PI * sigma^2) e^(-(x^2+y^2) / 2 sigma^2) - 1 / Math.sqrt(2 Math.PI * (1.6 sigma)^2) e^(-(x^2+y^2) / 2 (1.6 sigma)^2)

Fields inherited from class volume.Gaussian2D

sigma

Fields inherited from class volume.Kernel2D

k

Fields inherited from class volume.Kernel

halfwidth

Constructor Summary

DoG2D(double sigma)

Method Summary

protected double	function(double x, double y) Compute 2D Difference of Gaussian function (DoG) at x, y.
java.lang.String	toString()

Methods inherited from class volume.Gaussian2D

getSigma

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

DoG2D

public DoG2D(double sigma)

Method Detail

function

protected double function(double x,
                          double y)

Compute 2D Difference of Gaussian function (DoG) at x, y.

Overrides:

function in class Gaussian2D

Parameters:

x - the x position

y - the y position.

Returns:

a double with the value of the 2D Difference of Gaussian at x, y.

toString

public java.lang.String toString()

Overrides:

toString in class Gaussian2D