Package dev.brachtendorf.jimagehash.hashAlgorithms.filter

Class MultiKernel

java.lang.Object

dev.brachtendorf.jimagehash.hashAlgorithms.filter.Kernel

dev.brachtendorf.jimagehash.hashAlgorithms.filter.MultiKernel

All Implemented Interfaces:

Filter, Serializable

public class MultiKernel
extends Kernel

Wrapper class to apply multiple kernels in a consecutive manner.

Be aware that intermediary calculations are performed on an double precision and only the resulting value will be casted to the lesser precision type if applicable.

Since:

2.0.0

Author:

Kilian

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class dev.brachtendorf.jimagehash.hashAlgorithms.filter.Kernel

Kernel.EdgeHandlingStrategy, Kernel.GrayScaleFilter

Field Summary

Fields

Modifier and Type	Field	Description
protected List<Kernel>	kernels	The kernels to apply back to back

Fields inherited from class dev.brachtendorf.jimagehash.hashAlgorithms.filter.Kernel

edgeHandling, mask

Constructor Summary

Constructors

Constructor	Description
MultiKernel(double[][]... kernelMasks)	Create a multi kernel with the given kernel maks.
MultiKernel(Kernel.EdgeHandlingStrategy[] edgeHandlingStrategies, double[][]... kernelMasks)
MultiKernel(Kernel... kernels)	Create a multi kernel from the given kernels

Method Summary

Modifier and Type	Method	Description
double[][]	apply(byte[][] input)	Apply the kernel to the 2d array.
double[][]	apply(double[][] input)	Apply the kernel to the 2d array.
double[][]	apply(int[][] input)	Apply the kernel to the 2d array.
byte[][]	applyByte(byte[][] input)	Apply the kernel to the 2d array with each value casted to a byte value.
int[][]	applyInt(int[][] input)	Apply the kernel to the 2d array with each value casted to a int value.
String	toString()

Methods inherited from class dev.brachtendorf.jimagehash.hashAlgorithms.filter.Kernel

applyByte, applyInt, boxFilter, boxFilterNormalized, boxFilterNormalizedSep, calcValue, calcValue, calcValue, edgeDetectionFilter, embossHorizontontalFilter, embossLeftDiagonalFilter, embossleftRightFilter, embossRightDiagonalFilter, equals, filter, gaussianFilter, hashCode, identityFilter, zeroFilter

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

kernels

protected List<Kernel> kernels

The kernels to apply back to back

Constructor Detail

MultiKernel

public MultiKernel(Kernel... kernels)

Create a multi kernel from the given kernels

Parameters:

kernels - the kernels which will be chained

MultiKernel

public MultiKernel(double[][]... kernelMasks)

Create a multi kernel with the given kernel maks. The kernels will use the default EdgeHandlingStrategy#EXPAND

Parameters:

kernelMasks - used to construct the kernels

MultiKernel

public MultiKernel(Kernel.EdgeHandlingStrategy[] edgeHandlingStrategies,
                   double[][]... kernelMasks)

Method Detail

apply

public double[][] apply(int[][] input)

Description copied from class: Kernel

Apply the kernel to the 2d array. If the desired output is a int[][] array refer to Kernel.applyInt(int[][]).

Overrides:

apply in class Kernel

Parameters:

input - the input array to apply the kernel on

Returns:

a new array created by the kernel

applyInt

public int[][] applyInt(int[][] input)

Apply the kernel to the 2d array with each value casted to a int value.

Overrides:

applyInt in class Kernel

Parameters:

input - the input array to apply the kernel on

Returns:

a new array created by the kernel

apply

public double[][] apply(double[][] input)

Apply the kernel to the 2d array.

Overrides:

apply in class Kernel

Parameters:

input - the input array to apply the kernel on

Returns:

a new array created by the kernel

apply

public double[][] apply(byte[][] input)

Apply the kernel to the 2d array. If the desired output is a byte[][] array refer to applyByte(byte[][]).

Overrides:

apply in class Kernel

Parameters:

input - the input array to apply the kernel on

Returns:

a new array created by the kernel

applyByte

public byte[][] applyByte(byte[][] input)

Apply the kernel to the 2d array with each value casted to a byte value.

Overrides:

applyByte in class Kernel

Parameters:

input - the input array to apply the kernel on

Returns:

a new array created by the kernel

toString

public String toString()

Overrides:

toString in class Kernel