org.openimaj.image.analysis.watershed.feature

Class MomentFeature

java.lang.Object

org.openimaj.image.analysis.watershed.feature.MomentFeature

All Implemented Interfaces:

Cloneable, ComponentFeature

public class MomentFeature
extends Object
implements ComponentFeature

Accumulate the values of u11, u20 and u02 required to fit an ellipse to the feature.

Author:

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

Constructor Summary

Constructors

Constructor and Description
MomentFeature()

Method Summary

Modifier and Type	Method and Description
void	addSample(IntValuePixel p) Add a pixel to this feature
MomentFeature	clone() Create a clone of this feature
FImage	extractEllipsePatch(FImage image, double sf) Extract a rectangular image patch centered on the feature with the same primary orientation and a given scale factor.
Circle	getCircle(float sf) Create an ellipse based on the features parameters.
Ellipse	getEllipse() Create an ellipse based on the features parameters
Ellipse	getEllipse(float sf) Create an ellipse based on the features parameters.
Polygon	getEllipseBoundingBox(float sf) Create a rotated rectangle that fits around an ellipse based on the features parameters.
protected double[]	getEllipseBoundingRectsData(double sf)
double	getOrientation() Get the primary orientation of the feature.
double	m01() Get the value of m01
double	m10() Get the value of m10
void	merge(ComponentFeature f) Merge another feature with this one
double	n() Get the number of pixels accumulated
double	u02() Get the value of u02
double	u11() Get the value of u11
double	u20() Get the value of u20

Methods inherited from class java.lang.Object

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

Constructor Detail

MomentFeature

public MomentFeature()

Method Detail

merge

public void merge(ComponentFeature f)

Description copied from interface: ComponentFeature

Merge another feature with this one

Specified by:

merge in interface ComponentFeature

Parameters:

f - the feature to merge

addSample

public void addSample(IntValuePixel p)

Description copied from interface: ComponentFeature

Add a pixel to this feature

Specified by:

addSample in interface ComponentFeature

Parameters:

p - the pixel to add

n

public double n()

Get the number of pixels accumulated

Returns:

the number of pixels

u11

public double u11()

Get the value of u11

Returns:

the value of u11

u20

public double u20()

Get the value of u20

Returns:

the value of u20

u02

public double u02()

Get the value of u02

Returns:

the value of u02

m10

public double m10()

Get the value of m10

Returns:

the value of m10

m01

public double m01()

Get the value of m01

Returns:

the value of m01

clone

public MomentFeature clone()

Description copied from interface: ComponentFeature

Create a clone of this feature

Specified by:

clone in interface ComponentFeature

Overrides:

clone in class Object

Returns:

a cloned version of the feature

getEllipse

public Ellipse getEllipse()

Create an ellipse based on the features parameters

Returns:

an ellipse

getEllipse

public Ellipse getEllipse(float sf)

Create an ellipse based on the features parameters. Scale the ellipse about its centre with the given scale factor.

Parameters:

sf - the scale factor

Returns:

an ellipse

getCircle

public Circle getCircle(float sf)

Create an ellipse based on the features parameters. Scale the ellipse about its centre with the given scale factor.

Parameters:

sf - the scale factor

Returns:

an ellipse

getEllipseBoundingBox

public Polygon getEllipseBoundingBox(float sf)

Create a rotated rectangle that fits around an ellipse based on the features parameters. Scale the ellipse about its centre with the given scale factor.

Parameters:

sf - the scale factor

Returns:

a polygon representing a rotated rectangle

getOrientation

public double getOrientation()

Get the primary orientation of the feature.

Returns:

the orientation

getEllipseBoundingRectsData

protected double[] getEllipseBoundingRectsData(double sf)

extractEllipsePatch

public FImage extractEllipsePatch(FImage image,
                                  double sf)

Extract a rectangular image patch centered on the feature with the same primary orientation and a given scale factor.

Parameters:

image - the image to extract from

sf - the scale factor

Returns:

a rectangular image patch