svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libRaster / src / org / gvsig / raster / grid / filter / enhancement / EqualizationByteFilter.java @ 29786
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.raster.grid.filter.enhancement; |
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import org.gvsig.raster.dataset.IBuffer; |
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/**
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* Filtro de ecualizaci?n de histograma.
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*
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* @version 11/05/2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class EqualizationByteFilter extends EqualizationFilter { |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.grid.filter.enhancement.LinearEnhancementFilter#process(int, int)
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*/
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public void process(int col, int line) { |
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for (int iBand = 0; iBand < raster.getBandCount(); iBand++) { |
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int p = (int)(raster.getElemByte(line, col, iBand) & 0xff); |
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if(!equalizationActive(iBand)) {
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rasterResult.setElem(line, col, iBand, (byte)p);
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continue;
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} |
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//Las estad?sticas est?n calculadas para todas las bandas por lo que hay que seleccionar solo las que se renderiza
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if (p > maxBandValue[renderBands[iBand]])
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p = (int) maxBandValue[renderBands[iBand]];
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else if (p < minBandValue[renderBands[iBand]]) |
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p = (int) minBandValue[renderBands[iBand]];
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//M?todo lahe
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int ecualizationPositive = (int)lahe[iBand][p % histogram.getNumValues()]; |
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int ecualizationNegative = (int)laheNegative[iBand][nElements - (p % histogram.getNumValues())]; |
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int value = ((nElements - ecualizationNegative) + ecualizationPositive) / 2; |
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rasterResult.setElem(line, col, iBand, (byte)(value & 0x000000ff)); |
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} |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.grid.filter.enhancement.LinearEnhancementFilter#getInRasterDataType()
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*/
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public int getInRasterDataType() { |
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return IBuffer.TYPE_BYTE;
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} |
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} |