org.jscience.computing.ai.vision
Class GaussianFilter

java.lang.Object
  org.jscience.computing.ai.vision.Filter
      org.jscience.computing.ai.vision.ConvolutionFilter
          org.jscience.computing.ai.vision.GaussianFilter

public class GaussianFilter
extends ConvolutionFilter

Implements simple Gaussian smoothing. This extends ConvolutionFilter and calculates the kernel automatically from the standard deviation passed.

Field Summary

protected double

standardDeviation The standard deviation used in the gaussian spread (defaults to 1.0).

Fields inherited from class org.jscience.computing.ai.vision.ConvolutionFilter

kernel

Constructor Summary

GaussianFilter()
Creates a new instance of GaussianFilter

GaussianFilter(double standardDeviation)
Creates a new instance of GaussianFilter, with the standard deviation.

Method Summary

static float[]	createKernel(double stddev) This creates a gaussian filter with a given standard deviation.
protected static int	getSize(double stddev) Calculate the size of the kernel required for the standard deviation passed.
double	getStandardDeviation() Get the standard deviation.
static void	main(java.lang.String[] args) Utility method.
void	setStandardDeviation(double standardDeviation) Set the standard deviation used.

Methods inherited from class org.jscience.computing.ai.vision.ConvolutionFilter

filter, getKernel, setKernel, toString

Methods inherited from class org.jscience.computing.ai.vision.Filter

filter, verifyOutput, verifyOutput, verifyOutput

Methods inherited from class java.lang.Object

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

Field Detail

standardDeviation

protected double standardDeviation

The standard deviation used in the gaussian spread (defaults to 1.0).

Constructor Detail

GaussianFilter

public GaussianFilter()

Creates a new instance of GaussianFilter

GaussianFilter

public GaussianFilter(double standardDeviation)

Creates a new instance of GaussianFilter, with the standard deviation.

Parameters:

standardDeviation - the standard deviation.

Method Detail

main

public static void main(java.lang.String[] args)

Utility method.

Parameters:

args - the command line arguments

createKernel

public static float[] createKernel(double stddev)

This creates a gaussian filter with a given standard deviation. This method is exposed as public and static as a utility method.

Parameters:

stddev - the standard deviation.

Returns:

the kernel.

getSize

protected static int getSize(double stddev)

Calculate the size of the kernel required for the standard deviation passed.

Parameters:

stddev - the standard deviation.

Returns:

the kernel size.

getStandardDeviation

public double getStandardDeviation()

Get the standard deviation.

Returns:

the current standard deviation.

setStandardDeviation

public void setStandardDeviation(double standardDeviation)

Set the standard deviation used. The kernel is automatically regenerated when this method is called.

Parameters:

standardDeviation - the new standard deviation to use.