001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/processing/raster/converter/Image2RawData.java $
002    /*----------------------------------------------------------------------------
003     This file is part of deegree, http://deegree.org/
004     Copyright (C) 2001-2009 by:
005       Department of Geography, University of Bonn
006     and
007       lat/lon GmbH
008    
009     This library is free software; you can redistribute it and/or modify it under
010     the terms of the GNU Lesser General Public License as published by the Free
011     Software Foundation; either version 2.1 of the License, or (at your option)
012     any later version.
013     This library is distributed in the hope that it will be useful, but WITHOUT
014     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016     details.
017     You should have received a copy of the GNU Lesser General Public License
018     along with this library; if not, write to the Free Software Foundation, Inc.,
019     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020    
021     Contact information:
022    
023     lat/lon GmbH
024     Aennchenstr. 19, 53177 Bonn
025     Germany
026     http://lat-lon.de/
027    
028     Department of Geography, University of Bonn
029     Prof. Dr. Klaus Greve
030     Postfach 1147, 53001 Bonn
031     Germany
032     http://www.geographie.uni-bonn.de/deegree/
033    
034     e-mail: info@deegree.org
035    ----------------------------------------------------------------------------*/
036    package org.deegree.processing.raster.converter;
037    
038    import java.awt.image.BufferedImage;
039    import java.awt.image.DataBuffer;
040    import java.awt.image.WritableRaster;
041    import java.io.File;
042    import java.util.ArrayList;
043    import java.util.List;
044    
045    import org.apache.batik.ext.awt.image.codec.FileCacheSeekableStream;
046    import org.apache.batik.ext.awt.image.codec.tiff.TIFFDecodeParam;
047    import org.apache.batik.ext.awt.image.codec.tiff.TIFFImage;
048    import org.deegree.model.crs.CoordinateSystem;
049    import org.deegree.model.spatialschema.GeometryFactory;
050    import org.deegree.model.spatialschema.Point;
051    
052    /**
053     * Parses 4 channel (32Bit) tiff images as DEM and returns a float matrix containing the DEM heights
054     *
055     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
056     * @author last edited by: $Author: mschneider $
057     *
058     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
059     */
060    public class Image2RawData {
061    
062        private BufferedImage image;
063    
064        private DataBuffer db;
065    
066        private float scale = 0;
067    
068        private float offset = 0;
069    
070        private int width = 0;
071    
072        private int height = 0;
073    
074        /**
075         *
076         * @param dataFile
077         *            image containing raw data instead color information. Data file must be a TIFF
078         *            image
079         */
080        public Image2RawData( File dataFile ) {
081            this( dataFile, 1, 0 );
082        }
083    
084        /**
085         *
086         * @param dataFile
087         *            image containing raw data instead color information. Data file must be a TIFF
088         *            image
089         * @param scale
090         *            scale factor; newHeight[i][j] = height[i][j] * scale
091         */
092        public Image2RawData( File dataFile, float scale ) {
093            this( dataFile, scale, 0 );
094        }
095    
096        /**
097         *
098         * @param dataFile
099         *            image containing raw data instead color information. Data file must be a TIFF
100         *            image
101         * @param scale
102         *            scale factor; newHeight[i][j] = height[i][j] * scale
103         * @param offset
104         *            height offset; newHeight[i][j] = height[i][j] + offset
105         */
106        public Image2RawData( File dataFile, float scale, float offset ) {
107            try {
108                FileCacheSeekableStream fss = new FileCacheSeekableStream( dataFile.toURL().openStream() );
109                TIFFImage tiff = new TIFFImage( fss, new TIFFDecodeParam(), 0 );
110                image = new BufferedImage( tiff.getColorModel(), (WritableRaster) tiff.getData(), false, null );
111                width = tiff.getWidth();
112                height = tiff.getHeight();
113            } catch ( Exception e ) {
114                e.printStackTrace();
115            }
116            this.scale = scale;
117            this.offset = offset;
118        }
119    
120        /**
121         *
122         * @param data
123         *            image containing raw data instead color information
124         */
125        public Image2RawData( BufferedImage data ) {
126            this( data, 1, 0 );
127        }
128    
129        /**
130         *
131         * @param data
132         *            image containing raw data instead color information
133         * @param scale
134         *            scale factor; newHeight[i][j] = height[i][j] * scale
135         */
136        public Image2RawData( BufferedImage data, float scale ) {
137            this( data, scale, 0 );
138        }
139    
140        /**
141         *
142         * @param data
143         *            image containing raw data instead color information
144         * @param scale
145         *            scale factor; newHeight[i][j] = height[i][j] * scale
146         * @param offset
147         *            height offset; newHeight[i][j] = height[i][j] + offset
148         */
149        public Image2RawData( BufferedImage data, float scale, float offset ) {
150            image = data;
151            this.scale = scale;
152            this.offset = offset;
153            width = data.getWidth();
154            height = data.getHeight();
155        }
156    
157        /**
158         * returns the DEM heights as float matrix
159         *
160         * @return the DEM heights as float matrix
161         */
162        public float[][] parse() {
163    
164            float[][] terrain = new float[height][width];
165    
166            DataBuffer db = image.getData().getDataBuffer();
167            int ps = image.getColorModel().getPixelSize();
168            if ( ps == 8 ) {
169                for ( int j = 0; j < height; j++ ) {
170                    for ( int i = 0; i < width; i++ ) {
171                        terrain[j][i] = db.getElem( width * j + i ) * scale + offset;
172                    }
173                }
174            } else if ( ps == 16 ) {
175                for ( int j = 0; j < height; j++ ) {
176                    for ( int i = 0; i < width; i++ ) {
177                        terrain[j][i] = db.getElemFloat( width * j + i ) * scale + offset;
178                    }
179                }
180            } else if ( ps == 24 || ps == 32 ) {
181                for ( int j = 0; j < height; j++ ) {
182                    for ( int i = 0; i < width; i++ ) {
183                        int v = image.getRGB( i, j );
184                        terrain[j][i] = Float.intBitsToFloat( v ) * scale + offset;
185                    }
186                }
187            }
188    
189            return terrain;
190    
191        }
192    
193        /**
194         * @param x
195         *            index
196         * @param y
197         *            index
198         * @return the appropriate value
199         */
200        public float get( int x, int y ) {
201    
202            int ps = image.getColorModel().getPixelSize();
203    
204            if ( ps == 8 ) {
205                if ( db == null ) {
206                    db = image.getData().getDataBuffer();
207                }
208                return db.getElem( width * y + x ) * scale + offset;
209            } else if ( ps == 16 ) {
210                if ( db == null ) {
211                    db = image.getData().getDataBuffer();
212                }
213                return db.getElemFloat( width * y + x ) * scale + offset;
214            }
215    
216            return Float.intBitsToFloat( image.getRGB( x, y ) ) * scale + offset;
217    
218        }
219    
220        /**
221         * @param crs
222         *            of the points
223         * @return the DEM heights as pointlist matrix
224         */
225        public List<Point> parseAsPointList( CoordinateSystem crs ) {
226    
227            // float[][] terrain = new float[height][width];
228            List<Point> terrain = new ArrayList<Point>( height * width );
229    
230            DataBuffer db = image.getData().getDataBuffer();
231            int ps = image.getColorModel().getPixelSize();
232            if ( ps == 8 ) {
233                for ( int y = 0; ++y < height; ) {
234                    for ( int x = 0; ++x < width; ) {
235                        terrain.add( GeometryFactory.createPoint( x, y, db.getElem( width * y + x ) * scale + offset, crs ) );
236                    }
237                }
238            } else if ( ps == 16 ) {
239                for ( int y = 0; ++y < height; ) {
240                    for ( int x = 0; ++x < width; ) {
241                        terrain.add( GeometryFactory.createPoint( x, y, db.getElemFloat( width * y + x ) * scale + offset,
242                                                                  crs ) );
243                    }
244                }
245            } else if ( ps == 24 || ps == 32 ) {
246                for ( int y = 0; ++y < height; ) {
247                    for ( int x = 0; ++x < width; ) {
248                        int v = image.getRGB( x, y );
249                        terrain.add( GeometryFactory.createPoint( x, y, Float.intBitsToFloat( v ) * scale + offset, crs ) );
250                    }
251                }
252            }
253    
254            return terrain;
255    
256        }
257    
258    }