Package dev.brachtendorf.jimagehash.hashAlgorithms

Class DifferenceHash.DHash

java.lang.Object

dev.brachtendorf.jimagehash.hash.Hash

dev.brachtendorf.jimagehash.hashAlgorithms.DifferenceHash.DHash

All Implemented Interfaces:

Serializable

Enclosing class:

DifferenceHash

public static class DifferenceHash.DHash
extends Hash

An extended hash class allowing dhashes to be visually represented.

Since:

3.0.0

Author:

Kilian

See Also:

Serialized Form

Field Summary

Fields inherited from class dev.brachtendorf.jimagehash.hash.Hash

algorithmId, hashLength, hashValue

Constructor Summary

Constructors

Constructor	Description
DHash(Hash h, DifferenceHash.Precision precision, int width, int height)

Method Summary

Modifier and Type	Method	Description
BufferedImage	toImage(int blockSize)	Creates a visual representation of the hash mapping the hash values to the section of the rescaled image used to generate the hash assuming default bit encoding.
BufferedImage	toImage(int[] bitColorIndex, javafx.scene.paint.Color[] colors, int blockSize)	Creates a visual representation of the hash mapping the hash values to the section of the rescaled image used to generate the hash.

Methods inherited from class dev.brachtendorf.jimagehash.hash.Hash

equals, fromFile, getAlgorithmId, getBit, getBitResolution, getBitUnsafe, getHashValue, hammingDistance, hammingDistanceFast, hammingDistanceFast, hashCode, normalizedHammingDistance, normalizedHammingDistanceFast, toByteArray, toFile, toImage, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DHash

public DHash(Hash h,
             DifferenceHash.Precision precision,
             int width,
             int height)

Method Detail

toImage

public BufferedImage toImage(int blockSize)

Description copied from class: Hash

Creates a visual representation of the hash mapping the hash values to the section of the rescaled image used to generate the hash assuming default bit encoding.

Some hash algorithms may chose to construct their hashes in a non default manner (e.g. DifferenceHash). In this case Hash.toImage(int, HashingAlgorithm) may help to resolve the issue;

Overrides:

toImage in class Hash

Parameters:

blockSize - scaling factor of each pixel in the has. each bit of the hash will be represented to blockSize*blockSize pixels

Returns:

A black and white image representing the individual bits of the hash

toImage

public BufferedImage toImage(int[] bitColorIndex,
                             javafx.scene.paint.Color[] colors,
                             int blockSize)

Description copied from class: Hash

Creates a visual representation of the hash mapping the hash values to the section of the rescaled image used to generate the hash.

Overrides:

toImage in class Hash

Parameters:

bitColorIndex - array mapping each bit of the hash to a color of the color array

colors - array to colorize the pixels

blockSize - scaling factor of each pixel in the has. each bit of the hash will be represented to blockSize*blockSize pixels

Returns:

A colorized image representing the individual bits of the hash