/*---------------- FILE HEADER ------------------------------------------
This file is part of deegree.
Copyright (C) 2001-2006 by:
EXSE, Department of Geography, University of Bonn
http://www.giub.uni-bonn.de/deegree/
lat/lon GmbH
http://www.lat-lon.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Andreas Poth
lat/lon GmbH
Aennchenstr. 19
53177 Bonn
Germany
E-Mail: poth@lat-lon.de
Prof. Dr. Klaus Greve
Department of Geography
University of Bonn
Meckenheimer Allee 166
53115 Bonn
Germany
E-Mail: greve@giub.uni-bonn.de
---------------------------------------------------------------------------*/
package org.deegree.processing.raster.converter;
import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.WritableRaster;
import java.io.File;
import org.apache.batik.ext.awt.image.codec.FileCacheSeekableStream;
import org.apache.batik.ext.awt.image.codec.tiff.TIFFDecodeParam;
import org.apache.batik.ext.awt.image.codec.tiff.TIFFImage;
/**
* Parses 4 channel (32Bit) tiff images as DEM and returns
* a float matrix containing the DEM heights
*
*
* @version $Revision: 1.1 $
* @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
* @author last edited by: $Author: poth $
*
* @version 1.0. $Revision: 1.1 $, $Date: 2006/11/17 08:58:29 $
*
* @since 2.0
*/
public class Image2RawData {
private BufferedImage image;
private float scale = 0;
private float offset = 0;
private int width = 0;
private int height = 0;
/**
*
* @param dataFile image containing raw data instead color information.
* Data file must be a TIFF image
*/
public Image2RawData(File dataFile) {
this( dataFile, 1, 0 );
}
/**
*
* @param dataFile image containing raw data instead color information.
* Data file must be a TIFF image
* @param scale scale factor; newHeight[i][j] = height[i][j] * scale
*/
public Image2RawData(File dataFile, float scale) {
this( dataFile, scale, 0 );
}
/**
*
* @param dataFile image containing raw data instead color information.
* Data file must be a TIFF image
* @param scale scale factor; newHeight[i][j] = height[i][j] * scale
* @param offset height offset; newHeight[i][j] = height[i][j] + offset
*/
public Image2RawData(File dataFile, float scale, float offset) {
try {
FileCacheSeekableStream fss = new FileCacheSeekableStream( dataFile.toURL().openStream() );
TIFFImage tiff = new TIFFImage(fss, new TIFFDecodeParam(), 0 );
image = new BufferedImage( tiff.getColorModel(), (WritableRaster)tiff.getData(),
false, null );
width = tiff.getWidth();
height = tiff.getHeight();
} catch ( Exception e ) {
e.printStackTrace();
}
this.scale = scale;
this.offset = offset;
}
/**
*
* @param data image containing raw data instead color information
*/
public Image2RawData(BufferedImage data) {
this( data, 1, 0 );
}
/**
*
* @param data image containing raw data instead color information
* @param scale scale factor; newHeight[i][j] = height[i][j] * scale
*/
public Image2RawData(BufferedImage data, float scale) {
this( data, scale, 0 );
}
/**
*
* @param data image containing raw data instead color information
* @param scale scale factor; newHeight[i][j] = height[i][j] * scale
* @param offset height offset; newHeight[i][j] = height[i][j] + offset
*/
public Image2RawData(BufferedImage data, float scale, float offset) {
image = data;
this.scale = scale;
this.offset = offset;
width = data.getWidth();
height = data.getHeight();
}
/**
* returns the DEM heights as float matrix
* @return
*/
public float[][] parse() {
float[][] terrain = new float[height][width];
DataBuffer db = image.getData().getDataBuffer();
int ps = image.getColorModel().getPixelSize();
if ( ps == 8 ) {
for ( int j = 0; j < height; j++ ) {
for ( int i = 0; i < width; i++ ) {
terrain[j][i] = db.getElem( width * j + i ) * scale + offset;
}
}
} else if ( ps == 16 ) {
for ( int j = 0; j < height; j++ ) {
for ( int i = 0; i < width; i++ ) {
terrain[j][i] = db.getElemFloat( width * j + i ) * scale + offset;
}
}
} else if ( ps == 24 || ps == 32 ) {
for ( int j = 0; j < height; j++ ) {
for ( int i = 0; i < width; i++ ) {
int v = image.getRGB( i, j );
terrain[j][i] = Float.intBitsToFloat( v ) * scale + offset;
}
}
}
return terrain;
}
}
/* ********************************************************************
Changes to this class. What the people have been up to:
$Log: Image2RawData.java,v $
Revision 1.1 2006/11/17 08:58:29 poth
*** empty log message ***
Revision 1.4 2006/11/16 21:02:37 poth
bug fixes - rescaling images
Revision 1.3 2006/11/16 17:11:43 poth
*** empty log message ***
Revision 1.2 2006/11/14 20:53:55 poth
bug fix parsing raw data from image
Revision 1.1 2006/11/14 13:07:53 poth
lnitial checkin
Revision 1.2 2006/10/26 17:04:54 ap
*** empty log message ***
Revision 1.1 2006/10/23 09:01:25 ap
*** empty log message ***
********************************************************************** */