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java.awt.image
Class Kernel

java.lang.Object
  extended by 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.

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