org.openimaj.image.feature.dense.binarypattern

Class ExtendedLocalBinaryPattern

java.lang.Object

org.openimaj.image.feature.dense.binarypattern.ExtendedLocalBinaryPattern

All Implemented Interfaces:

ImageAnalyser<FImage>

@Reference(type=Article,
           author={"Ojala, Timo","Pietik\"{a}inen, Matti","M\"{a}enp\"{a}\"{a}, Topi"},
           title="Multiresolution Gray-Scale and Rotation Invariant Texture Classification with Local Binary Patterns",
           year="2002",
           journal="IEEE Trans. Pattern Anal. Mach. Intell.",
           pages={"971","","987"},
           url="http://dx.doi.org/10.1109/TPAMI.2002.1017623",
           month="July",
           number="7",
           publisher="IEEE Computer Society",
           volume="24",
           customData={"date","July 2002","issn","0162-8828","numpages","17","doi","10.1109/TPAMI.2002.1017623","acmid","628808","address","Washington, DC, USA"})
public class ExtendedLocalBinaryPattern
extends Object
implements ImageAnalyser<FImage>

Implementation of an extended local binary pattern which has a variable number of samples taken from a variable sized circle about a point.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Field Summary

Fields

Modifier and Type	Field and Description
protected int[][]	pattern
protected float	radius
protected int	samples

Constructor Summary

Constructors

Constructor and Description
ExtendedLocalBinaryPattern(float radius, int samples) Construct an extended LBP extractor with the given parameters.

Method Summary

Modifier and Type	Method and Description
void	analyseImage(FImage image) Analyse an image.
static int[][]	calculateLBP(FImage image, float radius, int samples) Calculate the LBP for every pixel in the image.
static int	calculateLBP(FImage image, float radius, int samples, int x, int y) Calculate the extended LBP for a single point.
static int	calculateLBP(FImage image, float radius, int samples, Pixel point) Calculate the extended LBP for a single point.
int[][]	getPattern() Get the pattern created during the last call to analyseImage(FImage).

Methods inherited from class java.lang.Object

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

Field Detail

pattern

protected int[][] pattern

radius

protected float radius

samples

protected int samples

Constructor Detail

ExtendedLocalBinaryPattern

public ExtendedLocalBinaryPattern(float radius,
                                  int samples)

Construct an extended LBP extractor with the given parameters.

Parameters:

radius - the radius of the sampling circle

samples - the number of samples around the circle

Method Detail

calculateLBP

public static int[][] calculateLBP(FImage image,
                                   float radius,
                                   int samples)

Calculate the LBP for every pixel in the image. The returned array of LBP codes hase the same dimensions as the image. Samples taken from outside the image bounds are assumed to have the value 0.

Parameters:

image - the image

radius - the radius of the sampling circle

samples - the number of samples around the circle

Returns:

a 2d-array of the LBP codes for every pixel

calculateLBP

public static int calculateLBP(FImage image,
                               float radius,
                               int samples,
                               int x,
                               int y)

Calculate the extended LBP for a single point. The point must be within the image.

Parameters:

image - the image

radius - the radius of the sampling circle

samples - the number of samples around the circle

x - the x-coordinate of the point

y - the y-coordinate of the point

Returns:

the LBP code

calculateLBP

public static int calculateLBP(FImage image,
                               float radius,
                               int samples,
                               Pixel point)

Calculate the extended LBP for a single point. The point must be within the image.

Parameters:

image - the image

radius - the radius of the sampling circle

samples - the number of samples around the circle

point - the point

Returns:

the LBP code

analyseImage

public void analyseImage(FImage image)

Description copied from interface: ImageAnalyser

Analyse an image.

Specified by:

analyseImage in interface ImageAnalyser<FImage>

Parameters:

image - The image to process in place.

getPattern

public int[][] getPattern()

Get the pattern created during the last call to analyseImage(FImage).

Returns:

the pattern