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.
    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 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