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.processing.face.alignment;
031
032import java.io.DataInput;
033import java.io.DataOutput;
034import java.io.IOException;
035
036import org.openimaj.image.FImage;
037import org.openimaj.image.processing.face.detection.DetectedFace;
038import org.openimaj.image.processing.resize.ResizeProcessor;
039
040/**
041 * A FaceAligner that just scales the face patch held with the
042 * {@link DetectedFace} to a predefined size. Useful if your faces are already
043 * aligned, but have different sizes.
044 * 
045 * @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
046 * 
047 * @param <T>
048 *            Type of {@link DetectedFace}.
049 * 
050 */
051public class ScalingAligner<T extends DetectedFace> implements FaceAligner<T> {
052        private int width;
053        private int height;
054
055        /**
056         * Construct with the default target size of 100x100.
057         */
058        public ScalingAligner() {
059                this(100, 100);
060        }
061
062        /**
063         * Construct the aligner with the given target size
064         * 
065         * @param width
066         *            width of scaled faces
067         * @param height
068         *            height of scaled faces
069         */
070        public ScalingAligner(int width, int height) {
071                this.width = width;
072                this.height = height;
073        }
074
075        @Override
076        public FImage align(DetectedFace face) {
077                return ResizeProcessor.resample(face.getFacePatch(), width, height);
078        }
079
080        @Override
081        public FImage getMask() {
082                return null;
083        }
084
085        @Override
086        public void readBinary(DataInput in) throws IOException {
087                width = in.readInt();
088                height = in.readInt();
089        }
090
091        @Override
092        public byte[] binaryHeader() {
093                return this.getClass().getName().getBytes();
094        }
095
096        @Override
097        public void writeBinary(DataOutput out) throws IOException {
098                out.writeInt(width);
099                out.writeInt(height);
100        }
101}