com.github.hypfvieh.imaging

Class AbstractImgHash

java.lang.Object

com.github.hypfvieh.imaging.AbstractImgHash

Direct Known Subclasses:

ImgAHash, ImgDHash, ImgPHash

public abstract class AbstractImgHash
extends Object

Constructor Summary

Constructors

Constructor and Description
AbstractImgHash()

Method Summary

Modifier and Type	Method and Description
protected String	bitmaskToHex(boolean[] bitMask, int _minLen) Converts a bitmask (array of boolean) to a hex string.
protected int[]	createPixelArray(BufferedImage _image) Convert the given image to an array of integer, where each array entry represents one pixel.
protected double[][]	createPixelArrayMatrix(BufferedImage _image) Creates a pixel array matrix from the given image.
protected BufferedImage	resizeAndGrayScale(int _width, int _height, BufferedImage _input) Convert the given image to grayscale and resize it to the given scale.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractImgHash

public AbstractImgHash()

Method Detail

createPixelArray

protected int[] createPixelArray(BufferedImage _image)

Convert the given image to an array of integer, where each array entry represents one pixel. The image is read from top to bottom, left to right.

Parameters:

_image - image

Returns:

int array or null if _image is null

createPixelArrayMatrix

protected double[][] createPixelArrayMatrix(BufferedImage _image)

Creates a pixel array matrix from the given image.

Parameters:

_image - image

Returns:

array of double array or null if _image is null

resizeAndGrayScale

protected BufferedImage resizeAndGrayScale(int _width,
                                           int _height,
                                           BufferedImage _input)

Convert the given image to grayscale and resize it to the given scale. Will return a new BufferedImage instance.

Parameters:

_width - width

_height - heigth

_input - input image

Returns:

BufferedImage or null if _input is null

bitmaskToHex

protected String bitmaskToHex(boolean[] bitMask,
                              int _minLen)

Converts a bitmask (array of boolean) to a hex string.

Parameters:

bitMask - mask

_minLen - length

Returns:

string