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 java.io.ByteArrayInputStream;
033import java.io.ByteArrayOutputStream;
034import java.io.IOException;
035import java.util.Iterator;
036
037import javax.imageio.IIOImage;
038import javax.imageio.ImageIO;
039import javax.imageio.ImageWriteParam;
040import javax.imageio.ImageWriter;
041import javax.imageio.stream.MemoryCacheImageOutputStream;
042
043import org.openimaj.image.ImageUtilities;
044import org.openimaj.image.MBFImage;
045
046
047public class CompressSimulation extends Simulation {
048        protected float minCompression = 0.1f;
049        protected float maxCompression = 1f;
050        
051        public CompressSimulation(int seed) {
052                super(seed);
053        }
054        
055        public CompressSimulation(int seed, float minCompression, float maxCompression) {
056                super(seed);
057                this.maxCompression = maxCompression;
058                this.minCompression = minCompression;
059        }
060
061        @Override
062        public MBFImage applySimulation(MBFImage input) {
063                try {
064                        Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName("jpeg");
065                        ImageWriter writer = iter.next();
066                        ImageWriteParam iwp = writer.getDefaultWriteParam();
067                        iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
068                        
069                        float compressionFactor = this.randomFloatInRange(minCompression, maxCompression);
070                        
071                        iwp.setCompressionQuality(compressionFactor);
072
073                        ByteArrayOutputStream output = new ByteArrayOutputStream();
074                        writer.setOutput(new MemoryCacheImageOutputStream(output));
075                        
076                        IIOImage image = new IIOImage(ImageUtilities.createBufferedImage(input), null, null);
077                        writer.write(null, image, iwp);
078                        
079                        return ImageUtilities.readMBF(new ByteArrayInputStream(output.toByteArray()));
080                } catch (IOException e) {
081                        throw new Error(e);
082                }
083        }
084
085}