svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / io / raster / LinearEnhancementImageFilter.java @ 4578
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| 1 | 2809 | 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.io.raster; |
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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 | |||
| 30 | /**
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| 31 | * Realzado Lineal (Amplitude Rescaling) para objetos Image.
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| 32 | * @author Luis W. Sevilla (sevilla_lui@gva.es)
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| 33 | * @author Nacho Brodin (brodin_ign@gva.es)
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| 34 | */
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| 35 | public class LinearEnhancementImageFilter extends LinearEnhancementFilter { |
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| 36 | /**
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| 37 | * Constructor
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| 38 | */
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| 39 | public LinearEnhancementImageFilter() {
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| 40 | super();
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| 41 | } |
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| 42 | |||
| 43 | /* (non-Javadoc)
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| 44 | * @see org.cresques.io.raster.IRasterFilter#pre()
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| 45 | */
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| 46 | public void pre() { |
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| 47 | //Obtenci?n de par?metros
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| 48 | this.image = (Image) params.get("raster"); |
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| 49 | this.stats = (RasterStats) params.get("stats"); |
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| 50 | this.removeExtrema = ((Boolean) params.get("remove")).booleanValue(); |
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| 51 | this.filename = (String) params.get("filename"); |
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| 52 | height = image.getHeight(null);
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| 53 | width = image.getWidth(null);
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| 54 | super.pre();
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| 55 | } |
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| 56 | |||
| 57 | /* (non-Javadoc)
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| 58 | * @see org.cresques.io.raster.IRasterFilter#process(int, int)
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| 59 | */
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| 60 | public void process(int x, int y) { |
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| 61 | int pt = ((BufferedImage) image).getRGB(x, y); |
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| 62 | int[] px4 = { |
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| 63 | ((pt & 0xff000000) >> 24) & 0xff, |
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| 64 | ((pt & 0xff0000) >> 16) & 0xff, |
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| 65 | ((pt & 0xff00) >> 8) & 0xff, pt & 0xff |
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| 66 | }; |
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| 67 | |||
| 68 | for (int i = 0; i < 3; i++) { |
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| 69 | if (px4[i + 1] > maxBandValue[i]) { |
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| 70 | px4[i + 1] = maxBandValue[i];
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| 71 | } else if (px4[i + 1] < minBandValue[i]) { |
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| 72 | px4[i + 1] = minBandValue[i];
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| 73 | } |
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| 74 | |||
| 75 | px4[i + 1] = (((int) ((((double) px4[i + 1]) * scale[i]) + |
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| 76 | offset[i])) & 0xff);
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| 77 | } |
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| 78 | |||
| 79 | ((BufferedImage) image).setRGB(x, y,
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| 80 | (((px4[0] << 24) & 0xff000000) | |
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| 81 | ((px4[1] << 16) & 0xff0000) | |
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| 82 | ((px4[2] << 8) & 0xff00) | |
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| 83 | (px4[3] & 0xff))); |
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| 84 | } |
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| 85 | |||
| 86 | /* (non-Javadoc)
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| 87 | * @see org.cresques.io.raster.IRasterFilter#getResult(java.lang.String)
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| 88 | */
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| 89 | public Object getResult(String name) { |
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| 90 | if (name.equals("raster")) { |
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| 91 | return (Object) this.image; |
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| 92 | } else {
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| 93 | return null; |
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| 94 | } |
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| 95 | } |
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| 96 | |||
| 97 | /* (non-Javadoc)
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| 98 | * @see org.cresques.io.raster.IRasterFilter#getInRasterDataType()
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| 99 | */
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| 100 | public int getInRasterDataType() { |
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| 101 | return RasterBuf.TYPE_IMAGE;
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| 102 | } |
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| 103 | |||
| 104 | /* (non-Javadoc)
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| 105 | * @see org.cresques.io.raster.IRasterFilter#getOutRasterDataType()
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| 106 | */
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| 107 | public int getOutRasterDataType() { |
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| 108 | return RasterBuf.TYPE_IMAGE;
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| 109 | } |
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| 110 | |||
| 111 | /* (non-Javadoc)
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| 112 | * @see org.cresques.io.raster.IRasterFilter#post()
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| 113 | */
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| 114 | public void post() { |
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| 115 | } |
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| 116 | |||
| 117 | /* (non-Javadoc)
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| 118 | * @see org.cresques.io.raster.RasterFilter#processLine(int)
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| 119 | */
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| 120 | public void processLine(int y) { |
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| 121 | } |
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| 122 | } |