java.awt.image
Class Kernel

java.lang.Object
  java.awt.image.Kernel

All Implemented Interfaces:

Cloneable

public class Kernel

extends Object

implements Cloneable

The Kernel class defines a matrix that describes how a specified pixel and its surrounding pixels affect the value computed for the pixel's position in the output image of a filtering operation. The X origin and Y origin indicate the kernel matrix element that corresponds to the pixel position for which an output value is being computed.

See Also:

ConvolveOp

Field Summary

private float[]	data
private int	height
private int	width
private int	xOrigin
private int	yOrigin

Constructor Summary

Kernel(int width, int height, float[] data)
Constructs a Kernel object from an array of floats.

Method Summary

Object	clone() Clones this object.
int	getHeight() Returns the height of this Kernel.
float[]	getKernelData(float[] data) Returns the kernel data in row major order.
int	getWidth() Returns the width of this Kernel.
int	getXOrigin() Returns the X origin of this Kernel.
int	getYOrigin() Returns the Y origin of this Kernel.
private static void	initIDs()

Methods inherited from class java.lang.Object

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

Field Detail

width

private int width

height

private int height

xOrigin

private int xOrigin

yOrigin

private int yOrigin

data

private float[] data

Constructor Detail

Kernel

public Kernel(int width,
              int height,
              float[] data)

Constructs a Kernel object from an array of floats. The first width*height elements of the data array are copied. If the length of the data array is less than width*height, an IllegalArgumentException is thrown. The X origin is (width-1)/2 and the Y origin is (height-1)/2.

Parameters:

width - width of the kernel

height - height of the kernel

data - kernel data in row major order

Throws:

IllegalArgumentException - if the length of data is less than the product of width and height

Method Detail

initIDs

private static void initIDs()

getXOrigin

public final int getXOrigin()

Returns the X origin of this Kernel.

Returns:

the X origin.

getYOrigin

public final int getYOrigin()

Returns the Y origin of this Kernel.

Returns:

the Y origin.

getWidth

public final int getWidth()

Returns the width of this Kernel.

Returns:

the width of this Kernel.

getHeight

public final int getHeight()

Returns the height of this Kernel.

Returns:

the height of this Kernel.

getKernelData

public final float[] getKernelData(float[] data)

Returns the kernel data in row major order. The data array is returned. If data is null, a new array is allocated.

Parameters:

data - if non-null, contains the returned kernel data

Returns:

the data array containing the kernel data in row major order or, if data is null, a newly allocated array containing the kernel data in row major order

Throws:

IllegalArgumentException - if data is less than the size of this Kernel

clone

public Object clone()

Clones this object.

Overrides:

clone in class Object

Returns:

a clone of this object.

See Also:

Cloneable