org.openimaj.image.feature.local.affine

Class ASIFT<I extends Image<P,I> & SinglebandImageProcessor.Processable<Float,FImage,I>,P>

java.lang.Object

org.openimaj.image.feature.local.affine.AffineSimulationExtractor<LocalFeatureList<Keypoint>,Keypoint,I,P>

org.openimaj.image.feature.local.affine.ASIFT<I,P>

Type Parameters:

I - Type of image

P - Type of pixel

Direct Known Subclasses:

BasicASIFT, ColourASIFT

@Reference(type=Article,
           author={"Morel, Jean-Michel","Yu, Guoshen"},
           title="{ASIFT: A New Framework for Fully Affine Invariant Image Comparison}",
           year="2009",
           journal="SIAM J. Img. Sci.",
           publisher="Society for Industrial and Applied Mathematics")
public abstract class ASIFT<I extends Image<P,I> & SinglebandImageProcessor.Processable<Float,FImage,I>,P>
extends AffineSimulationExtractor<LocalFeatureList<Keypoint>,Keypoint,I,P>

Abstract base implementation of Affine-simulated SIFT (ASIFT).

This is implemented as an extension of the AffineSimulationExtractor which uses a DoGSIFTEngine to extract SIFT features from each affine simulation.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk), Sina Samangooei (ss@ecs.soton.ac.uk)

Field Summary

Fields inherited from class org.openimaj.image.feature.local.affine.AffineSimulationExtractor

allInterestPoints, BorderFact, mappedInterestPoints, PI, simulationOrder

Constructor Summary

Constructors

Constructor and Description
ASIFT(boolean hires) A commonly used option, while all others in DoGSIFTEngineOptions are default
ASIFT(DoGSIFTEngineOptions<I> opts)

Method Summary

Modifier and Type	Method and Description
abstract Engine<Keypoint,I>	constructEngine(DoGSIFTEngineOptions<I> opts) An engine which can process images of type and output keypoints
protected LocalFeatureList<Keypoint>	detectFeatures(I image) Detect and describe the local features in the given (transformed) image.
protected LocalFeatureList<Keypoint>	newList() Construct a new list capable of holding the extracted features.

Methods inherited from class org.openimaj.image.feature.local.affine.AffineSimulationExtractor

detectFeatures, detectFeatures, detectFeatures, filterEdgesTransformed, getFeatures, getKeypointsMap

Methods inherited from class java.lang.Object

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

Constructor Detail

ASIFT

public ASIFT(boolean hires)

A commonly used option, while all others in DoGSIFTEngineOptions are default

Parameters:

hires - whether the image should be double sized as a first step

ASIFT

public ASIFT(DoGSIFTEngineOptions<I> opts)

Parameters:

opts - the options required by DoGSIFTEngine instances

Method Detail

constructEngine

public abstract Engine<Keypoint,I> constructEngine(DoGSIFTEngineOptions<I> opts)

An engine which can process images of type and output keypoints

Parameters:

opts -

Returns:

various engines

newList

protected LocalFeatureList<Keypoint> newList()

Description copied from class: AffineSimulationExtractor

Construct a new list capable of holding the extracted features.

Specified by:

newList in class AffineSimulationExtractor<LocalFeatureList<Keypoint>,Keypoint,I extends Image<P,I> & SinglebandImageProcessor.Processable<Float,FImage,I>,P>

Returns:

a new list

detectFeatures

protected LocalFeatureList<Keypoint> detectFeatures(I image)

Description copied from class: AffineSimulationExtractor

Detect and describe the local features in the given (transformed) image. The returned features should be in the coordinate system of the given image; they will be automatically filtered and transformed back to the original coordinate system.

Specified by:

detectFeatures in class AffineSimulationExtractor<LocalFeatureList<Keypoint>,Keypoint,I extends Image<P,I> & SinglebandImageProcessor.Processable<Float,FImage,I>,P>

Parameters:

image - the image in which to detect features

Returns:

the local interest features