org.openimaj.image.connectedcomponent.proc

Class BoundaryDistanceDescriptor

java.lang.Object

org.openimaj.image.connectedcomponent.proc.BoundaryDistanceDescriptor

All Implemented Interfaces:

FeatureVectorProvider<DoubleFV>, ConnectedComponentProcessor

public class BoundaryDistanceDescriptor
extends Object
implements ConnectedComponentProcessor, FeatureVectorProvider<DoubleFV>

Distance-from-centroid descriptor for convex shapes. Sweeps the edge of the shape over all angles in 0..360 and records the distance from the centroid. Scale invariance is optionally achieved by normalising the resultant vector to sum to 1. Rotation invariance is optionally achieved by measuring angles from the dominant orientation of the connected component.

Author:

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

Field Summary

Fields

Modifier and Type	Field and Description
double[]	descriptor The descriptor vector, measusring distance from centroid per degree
static int	DESCRIPTOR_LENGTH The number of samples
protected boolean	normaliseAngle
protected boolean	normaliseScale

Constructor Summary

Constructors

Constructor and Description
BoundaryDistanceDescriptor() Construct the BoundaryDistanceDescriptor with both scale and orientation normalisation enabled
BoundaryDistanceDescriptor(boolean normaliseDistance, boolean normaliseAngle) Construct the BoundaryDistanceDescriptor with optional scale and orientation invariance.

Method Summary

Modifier and Type	Method and Description
DoubleFV	getFeatureVector() Get the FeatureVector associated with this object.
double[]	getFeatureVectorArray() Get the feature vector as a double array
void	process(ConnectedComponent cc) Perform an operation on the given ConnectedComponent.

Methods inherited from class java.lang.Object

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

Field Detail

DESCRIPTOR_LENGTH

public static final int DESCRIPTOR_LENGTH

The number of samples

See Also:

Constant Field Values

descriptor

public double[] descriptor

The descriptor vector, measusring distance from centroid per degree

normaliseScale

protected boolean normaliseScale

normaliseAngle

protected boolean normaliseAngle

Constructor Detail

BoundaryDistanceDescriptor

public BoundaryDistanceDescriptor()

Construct the BoundaryDistanceDescriptor with both scale and orientation normalisation enabled

BoundaryDistanceDescriptor

public BoundaryDistanceDescriptor(boolean normaliseDistance,
                                  boolean normaliseAngle)

Construct the BoundaryDistanceDescriptor with optional scale and orientation invariance.

Parameters:

normaliseDistance - enable scale invariance

normaliseAngle - enable rotation invariance

Method Detail

process

public void process(ConnectedComponent cc)

Description copied from interface: ConnectedComponentProcessor

Perform an operation on the given ConnectedComponent.

Specified by:

process in interface ConnectedComponentProcessor

Parameters:

cc - The ConnectedComponent to process.

getFeatureVectorArray

public double[] getFeatureVectorArray()

Get the feature vector as a double array

Returns:

the feature vector

getFeatureVector

public DoubleFV getFeatureVector()

Description copied from interface: FeatureVectorProvider

Get the FeatureVector associated with this object.

Specified by:

getFeatureVector in interface FeatureVectorProvider<DoubleFV>

Returns:

the feature vector.