org.jscience.computing.ai.vision
Class NoiseFilter

java.lang.Object
  org.jscience.computing.ai.vision.Filter
      org.jscience.computing.ai.vision.NoiseFilter

public class NoiseFilter
extends Filter

Implements simple black-and-white (impulse/salt and pepper) noise and Gaussian noise.

Field Summary

static int	GAUSSIAN Create Gaussian noise.
static int	IMPULSE Create impulse noise.
protected double	impulseRatio The frequency of the impulse noise.
protected int	noiseType The noise type.
protected double	stdDev The standard deviation used for gaussian noise (default = 10).

Constructor Summary

NoiseFilter()
Creates a new instance of NoiseFilter

NoiseFilter(int noiseType)
Create a new instance of NoiseFilter, specifying the noise type.

NoiseFilter(int noiseType, double parameter)
Create a new instance of NoiseFilter, specifying the noise type and parameters.

Method Summary

java.awt.image.BufferedImage	filter(java.awt.image.BufferedImage image, java.awt.image.BufferedImage output) Apply noise to the input image.
protected java.awt.image.BufferedImage	gaussianNoise(java.awt.image.BufferedImage image, java.awt.image.BufferedImage output) Add gaussian noise to the input image.
double	getGaussianStdDev() Get the gaussian standard deviation.
double	getImpulseRatio() Get the impulse frequency.
int	getNoiseType() Get the noise type.
protected java.awt.image.BufferedImage	impulseNoise(java.awt.image.BufferedImage image, java.awt.image.BufferedImage output) Add impulse noise to the image.
static void	main(java.lang.String[] args) Simple test function.
void	setGaussianStdDev(double stdDev) Set the gaussian standard deviation.
void	setImpulseRatio(double impulseRatio) Set the impulse frequency.
void	setNoiseType(int noiseType) Set the noise type.

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, toString, wait, wait, wait

Field Detail

IMPULSE

public static final int IMPULSE

Create impulse noise.

See Also:

Constant Field Values

GAUSSIAN

public static final int GAUSSIAN

Create Gaussian noise.

See Also:

Constant Field Values

noiseType

protected int noiseType

The noise type.

stdDev

protected double stdDev

The standard deviation used for gaussian noise (default = 10).

impulseRatio

protected double impulseRatio

The frequency of the impulse noise.

Constructor Detail

NoiseFilter

public NoiseFilter()

Creates a new instance of NoiseFilter

NoiseFilter

public NoiseFilter(int noiseType)

Create a new instance of NoiseFilter, specifying the noise type.

Parameters:

noiseType - the noise type.

NoiseFilter

public NoiseFilter(int noiseType,
                   double parameter)

Create a new instance of NoiseFilter, specifying the noise type and parameters.

Parameters:

noiseType - the noise type.

parameter - if impule noise, the frequency. If gaussian noise, the standard deviation.

Method Detail

setNoiseType

public void setNoiseType(int noiseType)

Set the noise type.

Parameters:

noiseType - the new noise type.

getNoiseType

public int getNoiseType()

Get the noise type.

Returns:

the current noise type.

setGaussianStdDev

public void setGaussianStdDev(double stdDev)

Set the gaussian standard deviation.

Parameters:

stdDev - the new standard deviation.

getGaussianStdDev

public double getGaussianStdDev()

Get the gaussian standard deviation.

Returns:

the current standard deviation.

setImpulseRatio

public void setImpulseRatio(double impulseRatio)

Set the impulse frequency.

Parameters:

impulseRatio - the new impulse frequency.

getImpulseRatio

public double getImpulseRatio()

Get the impulse frequency.

Returns:

the current impulse frequency.

main

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

Simple test function.

Parameters:

args - the command line arguments

filter

public java.awt.image.BufferedImage filter(java.awt.image.BufferedImage image,
                                           java.awt.image.BufferedImage output)

Apply noise to the input image.

Specified by:

filter in class Filter

Parameters:

image - the input image.

output - the output image (optional).

Returns:

the filtered, noisy image.

See Also:

Filter.verifyOutput(BufferedImage,BufferedImage)

impulseNoise

protected java.awt.image.BufferedImage impulseNoise(java.awt.image.BufferedImage image,
                                                    java.awt.image.BufferedImage output)

Add impulse noise to the image.

Parameters:

image - the input image.

output - the output image.

Returns:

the noisy image.

gaussianNoise

protected java.awt.image.BufferedImage gaussianNoise(java.awt.image.BufferedImage image,
                                                     java.awt.image.BufferedImage output)

Add gaussian noise to the input image.

Parameters:

image - the input image.

output - the output image.

Returns:

the noisy image.