Class 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

Constructors

Constructor Description
Kernel​(int width, int height, float[] data)

Constructs a Kernel object from an array of floats.

Methods

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

Constructors

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

Methods

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

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/java/awt/image/Kernel.html