Kernel (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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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

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.

Methods inherited from class java.lang.Object

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

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

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