org.openimaj.image.analysis.algorithm

Class EdgeDirectionCoherenceVector

java.lang.Object

org.openimaj.image.analysis.algorithm.EdgeDirectionCoherenceVector

All Implemented Interfaces:

FeatureVectorProvider<DoubleFV>, ImageAnalyser<FImage>

public class EdgeDirectionCoherenceVector
extends Object
implements ImageAnalyser<FImage>, FeatureVectorProvider<DoubleFV>

Uses the Edge Direction Coherence Histograms to attempt to classify an image as city or landscape. This uses the coherent edge histogram technique described in "On Image Classification: City Images vs. Landscapes" by Vailaya, Jain and Zhang, Michigan State University.

Author:

David Dupplaw (dpd@ecs.soton.ac.uk), 7th July 2005, Jonathon Hare (jsh2@ecs.soton.ac.uk)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	EdgeDirectionCoherenceVector.EdgeDirectionCoherenceHistogram An edge direction histogram.

Constructor Summary

Constructors

Constructor and Description
EdgeDirectionCoherenceVector() Default constructor

Method Summary

Modifier and Type	Method and Description
void	analyseImage(FImage image) Analyse an image.
CannyEdgeDetector2	getCannyEdgeDetector() Get the edge detector used.
double	getCoherenceFactor() Get the edge coherence factor.
DoubleFV	getFeatureVector() Get the FeatureVector associated with this object.
EdgeDirectionCoherenceVector.EdgeDirectionCoherenceHistogram	getHistogram() Returns the edge direction coherence histogram that was calculated.
EdgeDirectionCoherenceVector.EdgeDirectionCoherenceHistogram	getLastHistogram()
int	getNumberOfDirBins()
void	setCoherenceFactor(double coherenceFactor) Set the edge coherence factor.
void	setNumberOfBins(int nb) Set the number of bins.

Methods inherited from class java.lang.Object

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

Constructor Detail

EdgeDirectionCoherenceVector

public EdgeDirectionCoherenceVector()

Default constructor

Method Detail

getNumberOfDirBins

public int getNumberOfDirBins()

Returns:

numberOfDirBins

setNumberOfBins

public void setNumberOfBins(int nb)

Set the number of bins.

Parameters:

nb - the number of bins

getLastHistogram

public EdgeDirectionCoherenceVector.EdgeDirectionCoherenceHistogram getLastHistogram()

Returns:

coDirHist

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.

getHistogram

public EdgeDirectionCoherenceVector.EdgeDirectionCoherenceHistogram getHistogram()

Returns the edge direction coherence histogram that was calculated.

Returns:

the edge direction coherence histogram.

getFeatureVector

public DoubleFV getFeatureVector()

Get the FeatureVector associated with this object.

Specified by:

getFeatureVector in interface FeatureVectorProvider<DoubleFV>

Returns:

the feature vector.

See Also:

FeatureVectorProvider.getFeatureVector()

getCannyEdgeDetector

public CannyEdgeDetector2 getCannyEdgeDetector()

Get the edge detector used.

Returns:

the canny edge detector

getCoherenceFactor

public double getCoherenceFactor()

Get the edge coherence factor. This is the relative size of the edge compared to the image over which an edge will be considered coherent and is generally a very small number. The default is 0.00002.

Returns:

the coherence factor

setCoherenceFactor

public void setCoherenceFactor(double coherenceFactor)

Set the edge coherence factor. This is the relative size of the edge compared to the image over which an edge will be considered coherent and is generally a very small number. The default is 0.00002.

Parameters:

coherenceFactor - the coherence factor value