001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package org.openimaj.image.feature.local.detector.ipd.collector;
031
032import org.openimaj.feature.OrientedFeatureVector;
033import org.openimaj.image.FImage;
034import org.openimaj.image.feature.local.detector.ipd.extractor.InterestPointGradientFeatureExtractor;
035import org.openimaj.image.feature.local.engine.ipd.InterestPointImageExtractorProperties;
036import org.openimaj.image.feature.local.interest.EllipticInterestPointData;
037
038/**
039 * Use the interest point's local shape to extract features from an affine
040 * corrected patch at the interest point.
041 * 
042 * @author Sina Samangooei (ss@ecs.soton.ac.uk)
043 * 
044 */
045public class AffineInterestPointFeatureCollector extends InterestPointFeatureCollector<EllipticInterestPointData> {
046
047        /**
048         * @param extractor
049         */
050        public AffineInterestPointFeatureCollector(InterestPointGradientFeatureExtractor extractor) {
051                super(extractor);
052        }
053
054        @Override
055        public void foundInterestPoint(FImage image, EllipticInterestPointData point) {
056                final InterestPointImageExtractorProperties<Float, FImage> property = new InterestPointImageExtractorProperties<Float, FImage>(
057                                image, point);
058                final OrientedFeatureVector[] extracted = extractor.extractFeature(property);
059
060                for (final OrientedFeatureVector feature : extracted) {
061                        features.add(new AffineInterestPointKeypoint(feature, point.clone()));
062                }
063
064        }
065
066        @Override
067        public void foundInterestPoint(FImage image, EllipticInterestPointData point, double octaveSize) {
068                final InterestPointImageExtractorProperties<Float, FImage> property = new InterestPointImageExtractorProperties<Float, FImage>(
069                                image, point);
070                final OrientedFeatureVector[] extracted = extractor.extractFeature(property);
071
072                for (final OrientedFeatureVector feature : extracted) {
073                        point = point.clone();
074                        point.scale *= octaveSize;
075                        point.x *= octaveSize;
076                        point.y *= octaveSize;
077
078                        features.add(new AffineInterestPointKeypoint(feature, point.clone()));
079                }
080        }
081}