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.analysis.algorithm;
031
032import org.openimaj.image.FImage;
033import org.openimaj.image.analyser.ImageAnalyser;
034
035/**
036 * Project an image onto the y-axis
037 * 
038 * @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
039 *
040 */
041public class VerticalProjection implements ImageAnalyser<FImage> {
042        float [] projection;
043        
044        @Override
045        public void analyseImage(FImage image) {
046                projection = project(image);
047        }
048
049        /**
050         * Project an image onto the y-axis.
051         * 
052         * @param image the image
053         * @return the projection
054         */
055        public static float[] project(FImage image) {
056                float [] projection = new float[image.height];
057                
058                for (int y=0; y<image.height; y++) {
059                        for (int x=0; x<image.width; x++) {
060                                projection[y] += image.pixels[y][x];
061                        }
062                }
063
064                return projection;
065        }
066
067        /**
068         * @return The projection an an image processed with {@link #analyseImage(FImage)}
069         */
070        public float[] getProjection() {
071                return projection;
072        }
073}