root / trunk / libraries / libCq_CMS_praster / src / org / cresques / filter / statistics / ComputeMinMaxImageFilter.java @ 8026
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| 1 | 8026 | 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.statistics; |
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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 | import org.cresques.io.data.RasterBuf; |
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| 30 | |||
| 31 | |||
| 32 | /**
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| 33 | * Clase base para los filtros de calculo de m?ximo y m?nimo en sus diferentes
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| 34 | * tipos de datos.
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| 35 | */
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| 36 | public class ComputeMinMaxImageFilter extends ComputeMinMaxFilter { |
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| 37 | |||
| 38 | /**
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| 39 | * Constructor
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| 40 | *
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| 41 | */
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| 42 | public ComputeMinMaxImageFilter() {
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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 | |||
| 53 | height = image.getHeight(null);
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| 54 | width = image.getWidth(null);
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| 55 | super.pre();
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| 56 | } |
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| 57 | |||
| 58 | /**
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| 59 | * Calcula el m?nimo y el m?ximo y lo salva sobre las variables de instancia min, max,
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| 60 | * @param px
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| 61 | */
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| 62 | private void calcMinMax(int px){ |
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| 63 | int pxBand = ((px & 0xff0000) >> 16); |
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| 64 | |||
| 65 | if (pxBand < min[0]) { |
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| 66 | secondMin[0] = min[0]; |
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| 67 | min[0] = pxBand;
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| 68 | } else if ((pxBand < secondMin[0]) && (pxBand != min[0])) { |
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| 69 | secondMin[0] = pxBand;
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| 70 | } |
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| 71 | |||
| 72 | if (pxBand > max[0]) { |
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| 73 | secondMax[0] = max[0]; |
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| 74 | max[0] = pxBand;
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| 75 | } else if ((pxBand > secondMax[0]) && (pxBand != max[0])) { |
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| 76 | secondMax[0] = pxBand;
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| 77 | } |
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| 78 | |||
| 79 | pxBand = ((px & 0x00ff00) >> 8); |
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| 80 | |||
| 81 | if (pxBand < min[1]) { |
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| 82 | secondMin[1] = min[1]; |
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| 83 | min[1] = pxBand;
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| 84 | } else if ((pxBand < secondMin[1]) && (pxBand != min[1])) { |
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| 85 | secondMin[1] = pxBand;
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| 86 | } |
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| 87 | |||
| 88 | if (pxBand > max[1]) { |
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| 89 | secondMax[1] = max[1]; |
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| 90 | max[1] = pxBand;
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| 91 | } else if ((pxBand > secondMax[1]) && (pxBand != max[1])) { |
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| 92 | secondMax[1] = pxBand;
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| 93 | } |
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| 94 | |||
| 95 | pxBand = (px & 0x0000ff);
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| 96 | |||
| 97 | if (pxBand < min[2]) { |
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| 98 | secondMin[2] = min[2]; |
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| 99 | min[2] = pxBand;
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| 100 | } else if ((pxBand < secondMin[2]) && (pxBand != min[2])) { |
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| 101 | secondMin[2] = pxBand;
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| 102 | } |
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| 103 | |||
| 104 | if (pxBand > max[2]) { |
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| 105 | secondMax[2] = max[2]; |
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| 106 | max[2] = pxBand;
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| 107 | } else if ((pxBand > secondMax[2]) && (pxBand != max[2])) { |
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| 108 | secondMax[2] = pxBand;
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| 109 | } |
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| 110 | |||
| 111 | } |
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| 112 | |||
| 113 | /* (non-Javadoc)
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| 114 | * @see org.cresques.io.raster.IRasterFilter#process(int, int)
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| 115 | */
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| 116 | public void process(int col, int line) { |
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| 117 | int px = ((BufferedImage) image).getRGB(col, line); |
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| 118 | calcMinMax(px); |
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| 119 | } |
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| 120 | |||
| 121 | /* (non-Javadoc)
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| 122 | * @see org.cresques.io.raster.IRasterFilter#processSuperSampling(int, int)
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| 123 | */
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| 124 | public void processSuperSampling(int col, int line) { |
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| 125 | process(col, line); |
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| 126 | } |
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| 127 | |||
| 128 | /* (non-Javadoc)
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| 129 | * @see org.cresques.io.raster.IRasterFilter#getInRasterDataType()
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| 130 | */
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| 131 | public int getInRasterDataType() { |
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| 132 | return RasterBuf.TYPE_IMAGE;
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| 133 | } |
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| 134 | |||
| 135 | /* (non-Javadoc)
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| 136 | * @see org.cresques.io.raster.IRasterFilter#getOutRasterDataType()
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| 137 | */
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| 138 | public int getOutRasterDataType() { |
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| 139 | return RasterBuf.TYPE_IMAGE;
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| 140 | } |
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| 141 | |||
| 142 | /* (non-Javadoc)
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| 143 | * @see org.cresques.io.raster.IRasterFilter#post()
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| 144 | */
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| 145 | public void post() { |
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| 146 | super.post();
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| 147 | } |
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| 148 | |||
| 149 | /* (non-Javadoc)
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| 150 | * @see org.cresques.io.raster.RasterFilter#processLine(int)
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| 151 | */
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| 152 | public void processLine(int y) { |
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| 153 | } |
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| 154 | } |