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.neardups.sim;
031
032import org.openimaj.image.MBFImage;
033
034/**
035 * Simulate rotations by 90,180,270,0 degrees
036 * 
037 * @author jsh2
038 *
039 */
040public class Rotate90Simulation extends Simulation {
041        public Rotate90Simulation(int seed) {
042                super(seed);
043        }
044
045        @Override
046        public MBFImage applySimulation(MBFImage input) {
047                int angle = random.nextInt(4);
048                MBFImage output = null;
049                
050                switch (angle) {
051                case 0:
052                        output = input.clone();
053                        break;
054                case 1:
055                        output = new MBFImage(input.getHeight(), input.getWidth(), input.numBands());
056                        for (int j=0; j<output.getHeight(); j++) {
057                                for (int i=0; i<output.getWidth(); i++) {
058                                        output.setPixel(i, j, input.getPixel(j, i));
059                                }
060                        }
061                        break;
062                case 2:
063                        output = new MBFImage(input.getWidth(), input.getHeight(), input.numBands());
064                        for (int j=0; j<output.getHeight(); j++) {
065                                for (int i=0; i<output.getWidth(); i++) {
066                                        output.setPixel(i, j, input.getPixel(i, input.getHeight() - j - 1));
067                                }
068                        }
069                        break;
070                case 3:
071                        output = new MBFImage(input.getHeight(), input.getWidth(), input.numBands());
072                        for (int j=0; j<output.getHeight(); j++) {
073                                for (int i=0; i<output.getWidth(); i++) {
074                                        output.setPixel(i, j, input.getPixel(input.getWidth() - j - 1, i));
075                                }
076                        }
077                        break;
078                }
079                
080                return output;
081        }
082
083}