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 }