svn-gvsig-desktop / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / correction / MedianByteFilter.java @ 27361
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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) 2004 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.correction; |
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import java.util.Arrays; |
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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 Mediana que se aplica en la imagen. Toma como entrada la imagen y
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* el lado de la ventana de filtrado.
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*
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* @author Diego Guerrero Sevilla <diego.guerrero@uclm.es>
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*/
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public class MedianByteFilter extends MedianFilter { |
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private int[] window = null; |
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public MedianByteFilter() {
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super();
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.grid.filter.correction.MedianFilter#pre()
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*/
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public void pre() { |
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super.pre();
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window = new int[sizeWindow]; |
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rasterResult = RasterBuffer.getBuffer(IBuffer.TYPE_BYTE, raster.getWidth(), raster.getHeight(), raster.getBandCount(), true);
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.grid.filter.correction.MedianFilter#process(int, int)
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*/
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public void process(int col, int line) throws InterruptedException { |
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// Obtener el vector con la ventanas de muestras
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for (int band = 0; band < raster.getBandCount(); band++) { |
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int k = 0; |
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for (int i = -halfSide; i <= halfSide; i++) |
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for (int j = -halfSide; j <= halfSide; j++) { |
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if ((col + i >= 0) && (line + j >= 0) && (col + i < width) && (line + j < height)) { |
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window[k] = raster.getElemByte(line + j, col + i, band) & 0xff;
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k++; |
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} |
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} |
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// Ordenar los valores de las ventanas, se supone que usa quickSort.
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Arrays.sort(window, 0, k); |
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// Extraer los elementos centrales y asignarselos al pixel (x,y)
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rasterResult.setElem(line, col, band, (byte) window[k >> 1]); |
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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.correction.MedianFilter#getInRasterDataType()
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*/
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public int getInRasterDataType() { |
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return RasterBuffer.TYPE_BYTE;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.grid.filter.RasterFilter#getOutRasterDataType()
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*/
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public int getOutRasterDataType() { |
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return RasterBuffer.TYPE_BYTE;
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} |
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} |