de.lmu.dbs.jfeaturelib.features

Class PHOG

java.lang.Object

de.lmu.dbs.jfeaturelib.features.AbstractFeatureDescriptor

de.lmu.dbs.jfeaturelib.features.PHOG

All Implemented Interfaces:

Descriptor, FeatureDescriptor

public class PHOG
extends AbstractFeatureDescriptor

Generates Pyramid Histograms of Oriented Gradients (PHoG). Phogs were first introduced in "Representing shape with a spatial pyramid kernel" (2007). By Anna Bosch, Andrew Zisserman, Xavier Munoz See also http://www.robots.ox.ac.uk/~vgg/publications/2007/Bosch07/ and http://dl.acm.org/citation.cfm?id=1282340 for further information. In the original paper, canny edge extraction is applied prior to extracting the gradients. As edge detection can be performed in several ways, it is not hard wired. It can be enabled in the properties by setting features.phog.canny to true. The parameters for the canny operator are also taken from the properties file. If another edge detection operator should be used, simple set the canny parameter to false and call run(ij.process.ImageProcessor) with an pre processed image.

Since:

11/4/2011

Nested Class Summary

Nested classes/interfaces inherited from interface de.lmu.dbs.jfeaturelib.Descriptor

Descriptor.Supports

Field Summary

Fields inherited from class de.lmu.dbs.jfeaturelib.features.AbstractFeatureDescriptor

pcs

Fields inherited from interface de.lmu.dbs.jfeaturelib.Descriptor

DOES_ALL

Constructor Summary

Constructors

Constructor and Description
PHOG()

Method Summary

Methods

Modifier and Type	Method and Description
int	getBins()
java.lang.String	getDescription() Returns a short plain Text description about the Descriptor and the semantics of the double array obtained from FeatureDescriptor.getFeatures().
GradientSource	getGradientSource()
int	getRecursions()
void	run(ij.process.ImageProcessor ip) Start processing of this algorithm on the given image processor.
void	setBins(int bins)
void	setGradientSource(GradientSource gradientSource)
void	setProperties(LibProperties properties) Injects the properties class that can be used to retrieve several properties.
void	setRecursions(int recursions)
java.util.EnumSet<Descriptor.Supports>	supports() Determine the capabilities of this algorithm.

Methods inherited from class de.lmu.dbs.jfeaturelib.features.AbstractFeatureDescriptor

addData, addData, addData, addPropertyChangeListener, endProgress, firePropertyChange, getFeatures, startProgress

Methods inherited from class java.lang.Object

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

Constructor Detail

PHOG

public PHOG()

Method Detail

setProperties

public void setProperties(LibProperties properties)
                   throws java.io.IOException

Description copied from interface: FeatureDescriptor

Injects the properties class that can be used to retrieve several properties.

Specified by:

setProperties in interface FeatureDescriptor

Overrides:

setProperties in class AbstractFeatureDescriptor

Throws:

java.io.IOException - if something went wrong

run

public void run(ij.process.ImageProcessor ip)

Description copied from interface: Descriptor

Start processing of this algorithm on the given image processor. Keep in mind that if the imageProcessor is changed, Supports.NoChanges must not be set. This is also the case even if only ImageProcessor.snapshot() is used.

supports

public java.util.EnumSet<Descriptor.Supports> supports()

Description copied from interface: Descriptor

Determine the capabilities of this algorithm.

Specified by:

supports in interface Descriptor

Overrides:

supports in class AbstractFeatureDescriptor

Returns:

getDescription

public java.lang.String getDescription()

Description copied from interface: FeatureDescriptor

Returns a short plain Text description about the Descriptor and the semantics of the double array obtained from FeatureDescriptor.getFeatures(). May return null if no description is implemented - even though this should be avoided by any means.

Returns:

semantic description of getFeatures or null.

getGradientSource

public GradientSource getGradientSource()

setGradientSource

public void setGradientSource(GradientSource gradientSource)

getBins

public int getBins()

setBins

public void setBins(int bins)

getRecursions

public int getRecursions()

setRecursions

public void setRecursions(int recursions)