Module java.desktop

Package 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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
Object	clone()	Clones this object.
final int	getHeight()	Returns the height of this Kernel.
final float[]	getKernelData(float[] data)	Returns the kernel data in row major order.
final int	getWidth()	Returns the width of this Kernel.
final int	getXOrigin()	Returns the X origin of this Kernel.
final int	getYOrigin()	Returns the Y origin of this Kernel.

Methods declared in class java.lang.Object

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

Constructor Details

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 Details

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