root / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / convolution / ConvolutionFloatFilter.java @ 21803
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/* gvSIG. Sistema de Informaci?n Geogrfica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 Instituto de Desarrollo Regional 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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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Iba?ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)
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* Campus Universitario s/n
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* 02071 Alabacete
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* Spain
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*
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* +34 967 599 200
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*/
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package org.gvsig.raster.grid.filter.convolution; |
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import org.gvsig.raster.buffer.RasterBuffer; |
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import org.gvsig.raster.dataset.IBuffer; |
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/**
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* Filtro de convolucion para Buffer de tipo Float
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* @author Alejandro Mu?oz <alejandro.munoz@uclm.es>
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* @author Diego Guerrero Sevilla <diego.guerrero@uclm.es>
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* */
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public class ConvolutionFloatFilter extends ConvolutionFilter { |
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public ConvolutionFloatFilter(){
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super();
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} |
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/**
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* @param Kernel a aplicar. En caso de que no se trate de un kernel definido en ConvolutionFilter, se puede pasar como
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* parametro el kernel se pretende aplicar.
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* **/
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public ConvolutionFloatFilter(Kernel k){ |
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super();
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super.kernel=k;
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} |
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public void pre(){ |
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super.pre();
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rasterResult = RasterBuffer.getBuffer(IBuffer.TYPE_FLOAT, raster.getWidth(), raster.getHeight(), raster.getBandCount(), true);
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} |
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/** Aplicacion del filtro para el pixel de la posicion line, col */
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public void process(int col, int line) { |
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int lado= kernel.getLado();
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int semiLado = (lado - 1) >> 1; |
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double ventana[][]= new double[lado][lado]; |
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double resultConvolution=0; |
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for (int band = 0; band < raster.getBandCount(); band++) { |
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if ((col - semiLado >= 0) && (line - semiLado >= 0) && (col + semiLado < width) && (line + semiLado < height)){ |
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for (int j = -semiLado; j <= semiLado; j++) |
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for (int i = -semiLado; i <= semiLado; i++) |
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ventana[i + semiLado][j + semiLado] = raster.getElemFloat(line + j, col + i, band);; |
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Kernel Kventana= new Kernel(ventana); |
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resultConvolution=kernel.convolution(Kventana); |
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if(resultConvolution>Float.MAX_VALUE) |
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resultConvolution=Float.MAX_VALUE;
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else if (resultConvolution<0) |
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resultConvolution = 0;
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rasterResult.setElem(line, col, band,(float)resultConvolution);
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} |
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else rasterResult.setElem(line, col,band,raster.getElemFloat(line,col,band));
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} |
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} |
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/**
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* @return tipo de dato del buffer de entrada
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* */
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public int getInRasterDataType() { |
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return RasterBuffer.TYPE_FLOAT;
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} |
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/**
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* @return tipo de dato del buffer de salida
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* */
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public int getOutRasterDataType() { |
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return RasterBuffer.TYPE_FLOAT;
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} |
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/**
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* @return buffer resultante tras aplicar el filtro
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* */
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public Object getResult(String name) { |
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if (name.equals("raster")) |
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return this.rasterResult; |
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return null; |
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} |
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} |