svn-gvsig-desktop / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / enhancement / EcualizationShortFilter.java @ 20652
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1 | 20652 | nbrodin | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | */
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19 | package org.gvsig.raster.grid.filter.enhancement; |
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20 | |||
21 | import org.gvsig.raster.dataset.IBuffer; |
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22 | /**
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23 | * Filtro de ecualizaci?n de histograma para tipo de datos short.
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24 | *
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25 | * @version 11/05/2007
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26 | * @author Nacho Brodin (nachobrodin@gmail.com)
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27 | */
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28 | public class EcualizationShortFilter extends EqualizationFilter { |
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29 | |||
30 | /*
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31 | * (non-Javadoc)
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32 | * @see org.gvsig.raster.grid.filter.enhancement.LinearEnhancementFilter#process(int, int)
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33 | */
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34 | public void process(int col, int line) { |
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35 | for (int iBand = 0; iBand < raster.getBandCount(); iBand++) { |
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36 | short p = raster.getElemShort(line, col, iBand);
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37 | if(!equalizationActive(iBand)) {
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38 | rasterResult.setElem(line, col, iBand, p); |
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39 | continue;
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40 | } |
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41 | |||
42 | if (p > maxBandValue[renderBands[iBand]])
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43 | p = (short) maxBandValue[renderBands[iBand]];
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44 | else if (p < minBandValue[renderBands[iBand]]) |
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45 | p = (short) minBandValue[renderBands[iBand]];
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46 | |||
47 | int ecualizationPositive = (int)(aproximation[renderBands[iBand]][p % nClasses] * nClasses); |
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48 | int ecualizationNegative = (int)(aproximationNeg[renderBands[iBand]][nElements - (p % nClasses)] * nClasses); |
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49 | double value = ((nElements - ecualizationNegative) + ecualizationPositive) / 2; |
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50 | |||
51 | rasterResult.setElem(line, col, iBand, (short)value);
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52 | } |
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53 | } |
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54 | |||
55 | /*
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56 | * (non-Javadoc)
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57 | * @see org.gvsig.raster.grid.filter.enhancement.LinearEnhancementFilter#getInRasterDataType()
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58 | */
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59 | public int getInRasterDataType() { |
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60 | return IBuffer.TYPE_SHORT;
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61 | } |
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62 | |||
63 | /*
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64 | * (non-Javadoc)
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65 | * @see org.gvsig.raster.grid.filter.RasterFilter#getOutRasterDataType()
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66 | */
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67 | public int getOutRasterDataType() { |
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68 | return IBuffer.TYPE_SHORT;
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69 | } |
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70 | } |