svn-gvsig-desktop / tags / v1_1_Build_1010 / libraries / libCq CMS for java.old / src / org / cresques / filter / enhancement / LinearEnhancementImageFilter.java @ 12804
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| 1 | 9056 | nacho | /*
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| 2 | * Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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| 3 | *
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| 4 | * Copyright (C) 2004-5.
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| 5 | *
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| 6 | * This program is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU General Public License
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| 8 | * as published by the Free Software Foundation; either version 2
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| 9 | * of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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| 19 | *
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| 20 | * For more information, contact:
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| 21 | *
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| 22 | * cresques@gmail.com
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| 23 | */
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| 24 | package org.cresques.filter.enhancement; |
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| 25 | |||
| 26 | import java.awt.Image; |
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| 27 | import java.awt.image.BufferedImage; |
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| 28 | |||
| 29 | 10194 | nacho | import org.cresques.io.data.RasterBuf; |
| 30 | 9056 | nacho | import org.cresques.io.datastruct.Statistic; |
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| 32 | |||
| 33 | /**
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| 34 | * Realzado Lineal (Amplitude Rescaling) para objetos Image.
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| 35 | * @author Luis W. Sevilla (sevilla_lui@gva.es)
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| 36 | * @author Nacho Brodin (brodin_ign@gva.es)
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| 37 | */
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| 38 | public class LinearEnhancementImageFilter extends LinearEnhancementFilter { |
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| 39 | /**
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| 40 | * Constructor
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| 41 | */
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| 42 | public LinearEnhancementImageFilter() {
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| 43 | super();
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| 44 | } |
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| 45 | |||
| 46 | /* (non-Javadoc)
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| 47 | * @see org.cresques.io.raster.IRasterFilter#pre()
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| 48 | */
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| 49 | public void pre() { |
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| 50 | //Obtenci?n de par?metros
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| 51 | this.image = (Image) params.get("raster"); |
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| 52 | this.stats = (Statistic) params.get("stats"); |
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| 53 | this.removeExtrema = ((Boolean) params.get("remove")).booleanValue(); |
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| 54 | this.filename = (String) params.get("filename"); |
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| 55 | height = image.getHeight(null);
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| 56 | width = image.getWidth(null);
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| 57 | super.pre();
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| 58 | } |
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| 59 | |||
| 60 | /* (non-Javadoc)
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| 61 | * @see org.cresques.io.raster.IRasterFilter#process(int, int)
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| 62 | */
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| 63 | public void process(int x, int y) { |
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| 64 | int pt = ((BufferedImage) image).getRGB(x, y); |
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| 65 | int[] px4 = { |
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| 66 | ((pt & 0xff000000) >> 24) & 0xff, |
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| 67 | ((pt & 0xff0000) >> 16) & 0xff, |
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| 68 | ((pt & 0xff00) >> 8) & 0xff, pt & 0xff |
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| 69 | }; |
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| 70 | |||
| 71 | for (int i = 0; i < 3; i++) { |
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| 72 | if (px4[i + 1] > maxBandValue[i]) { |
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| 73 | px4[i + 1] = maxBandValue[i];
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| 74 | } else if (px4[i + 1] < minBandValue[i]) { |
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| 75 | px4[i + 1] = minBandValue[i];
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| 76 | } |
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| 77 | |||
| 78 | px4[i + 1] = (((int) ((((double) px4[i + 1]) * scale[i]) + |
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| 79 | offset[i])) & 0xff);
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| 80 | } |
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| 81 | |||
| 82 | ((BufferedImage) image).setRGB(x, y,
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| 83 | (((px4[0] << 24) & 0xff000000) | |
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| 84 | ((px4[1] << 16) & 0xff0000) | |
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| 85 | ((px4[2] << 8) & 0xff00) | |
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| 86 | (px4[3] & 0xff))); |
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| 87 | } |
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| 88 | |||
| 89 | /* (non-Javadoc)
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| 90 | * @see org.cresques.io.raster.IRasterFilter#getResult(java.lang.String)
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| 91 | */
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| 92 | public Object getResult(String name) { |
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| 93 | if (name.equals("raster")) { |
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| 94 | return (Object) this.image; |
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| 95 | } else {
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| 96 | return null; |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 100 | /* (non-Javadoc)
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| 101 | * @see org.cresques.io.raster.IRasterFilter#getInRasterDataType()
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| 102 | */
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| 103 | public int getInRasterDataType() { |
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| 104 | return RasterBuf.TYPE_IMAGE;
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| 105 | } |
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| 106 | |||
| 107 | /* (non-Javadoc)
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| 108 | * @see org.cresques.io.raster.IRasterFilter#getOutRasterDataType()
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| 109 | */
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| 110 | public int getOutRasterDataType() { |
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| 111 | return RasterBuf.TYPE_IMAGE;
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| 112 | } |
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| 113 | |||
| 114 | /* (non-Javadoc)
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| 115 | * @see org.cresques.io.raster.IRasterFilter#post()
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| 116 | */
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| 117 | public void post() { |
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| 118 | } |
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| 119 | |||
| 120 | /* (non-Javadoc)
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| 121 | * @see org.cresques.io.raster.RasterFilter#processLine(int)
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| 122 | */
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| 123 | public void processLine(int y) { |
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| 124 | } |
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| 125 | } |