svn-gvsig-desktop / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / enhancement / EcualizationByteFilter.java @ 19494
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| 1 | 19409 | 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.
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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 EcualizationByteFilter extends EcualizationFilter { |
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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 | 19491 | nbrodin | int p = (int)(raster.getElemByte(line, col, iBand) & 0xff); |
| 37 | if(!ecualizationActive(iBand)) {
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| 38 | rasterResult.setElem(line, col, iBand, (byte)p);
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| 39 | continue;
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| 40 | } |
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| 41 | |||
| 42 | 19409 | nbrodin | if (p > maxBandValue[renderBands[iBand]])
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| 43 | p = (int) maxBandValue[renderBands[iBand]];
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| 44 | else if (p < minBandValue[renderBands[iBand]]) |
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| 45 | p = (int) minBandValue[renderBands[iBand]];
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| 46 | 19491 | nbrodin | |
| 47 | long ecualizationPositive = lahe[renderBands[iBand]][p % histogram.getNumValues()];
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| 48 | long ecualizationNegative = laheNegative[renderBands[iBand]][nElements - (p % histogram.getNumValues())];
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| 49 | 19453 | nbrodin | double value = ((nElements - ecualizationNegative) + ecualizationPositive) / 2; |
| 50 | rasterResult.setElem(line, col, iBand, (byte)value);
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| 51 | 19409 | nbrodin | } |
| 52 | } |
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| 53 | |||
| 54 | /*
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| 55 | * (non-Javadoc)
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| 56 | * @see org.gvsig.raster.grid.filter.enhancement.LinearEnhancementFilter#getInRasterDataType()
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| 57 | */
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| 58 | public int getInRasterDataType() { |
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| 59 | return IBuffer.TYPE_BYTE;
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| 60 | } |
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| 61 | } |