root / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / enhancement / LinearEnhancementFilter.java @ 21803
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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.buffer.RasterBuffer; |
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import org.gvsig.raster.dataset.FileNotOpenException; |
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import org.gvsig.raster.dataset.IBuffer; |
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import org.gvsig.raster.dataset.Params; |
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import org.gvsig.raster.dataset.io.RasterDriverException; |
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import org.gvsig.raster.dataset.properties.DatasetListStatistics; |
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import org.gvsig.raster.grid.filter.RasterFilter; |
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/**
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* Clase base para los filtros de realzado lineal. Lee el m?nimo y m?xmo de la
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* clase Statistic que ser?n calculados por PercentTailTrimFilter o
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* ComputeMinMaxFilter dependiendo de si est? activado el recorte de colas o no.
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* En Statistic tambi?n est?n los segundos valores despu?s del m?nimo y m?ximo
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* que son los que se utilizan con la opci?n eliminar extremos activada. Estos
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* se usaran en vez del m?nimo y m?ximo cuando la variable removeExtrema est? a
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* true.
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*
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* @version 31/05/2007
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class LinearEnhancementFilter extends RasterFilter { |
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protected double[] scale = new double[3]; |
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protected double[] offset = new double[3]; |
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protected DatasetListStatistics stats = null; |
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protected double[] minBandValue = null; |
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protected double[] maxBandValue = null; |
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protected boolean removeEnds = false; |
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protected double tailTrim = 0D; |
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protected int nbands = 3; |
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protected int[] renderBands = null; |
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public static String[] names = new String[] {"enhanced"}; |
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/**
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* Construye un LinearEnhancementFilter
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*/
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public LinearEnhancementFilter() {
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setName(names[0]);
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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#pre()
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*/
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public void pre() { |
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raster = (IBuffer) params.get("raster");
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stats = (DatasetListStatistics) params.get("stats");
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removeEnds = ((Boolean) params.get("remove")).booleanValue(); |
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tailTrim = ((Double) params.get("tailTrim")).doubleValue(); |
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// En realidad esto no se deberia hacer, pero por logica, un valor del 50%
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// devolveria una capa en blanco, asi que evitamos un resultado supuestamente
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// no esperado
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if ((tailTrim >= 0.5) && (tailTrim < 0.51)) |
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tailTrim = 0.51;
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if ((tailTrim > 0.49) && (tailTrim < 0.50)) |
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tailTrim = 0.49;
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renderBands = (int[]) params.get("renderBands"); |
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if(renderBands != null && renderBands.length < raster.getBandCount()) { |
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int[] newRenderBands = new int[raster.getBandCount()]; |
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for (int i = 0; i < renderBands.length; i++) |
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newRenderBands[i] = renderBands[i]; |
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for (int i = renderBands.length; i < newRenderBands.length; i++) |
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newRenderBands[i] = i; |
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renderBands = newRenderBands; |
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} |
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height = raster.getHeight(); |
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width = raster.getWidth(); |
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try {
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stats.calcFullStatistics(); |
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} catch (FileNotOpenException e) {
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exec = false;
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} catch (RasterDriverException e) {
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exec = false;
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} catch (InterruptedException e) { |
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exec = false;
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} |
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double[][] tailTrimByBand = (double[][]) stats.getTailTrimValue(tailTrim); |
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if ((tailTrim != 0) && (tailTrimByBand != null)) { // Max y Min con recorte de colas |
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scale = new double[tailTrimByBand.length]; |
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offset = new double[tailTrimByBand.length]; |
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minBandValue = new double[tailTrimByBand.length]; |
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maxBandValue = new double[tailTrimByBand.length]; |
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for (int i = 0; i < tailTrimByBand.length; i++) { |
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minBandValue[i] = tailTrimByBand[i][0];
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maxBandValue[i] = tailTrimByBand[i][1];
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} |
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} else {
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scale = new double[stats.getMin().length]; |
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offset = new double[stats.getMin().length]; |
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if (removeEnds) { // Si est? activado eliminar extremos gastamos el 2? m?ximo/m?nimo |
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if(raster.getDataType() == IBuffer.TYPE_BYTE) {
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minBandValue = stats.getSecondMinRGB(); |
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maxBandValue = stats.getSecondMaxRGB(); |
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} else {
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minBandValue = stats.getSecondMin(); |
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maxBandValue = stats.getSecondMax(); |
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} |
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} else { // Si no est? activado eliminar extremos |
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if(raster.getDataType() == IBuffer.TYPE_BYTE) {
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minBandValue = stats.getMinRGB(); |
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maxBandValue = stats.getMaxRGB(); |
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} else {
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minBandValue = stats.getMin(); |
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maxBandValue = stats.getMax(); |
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} |
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} |
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} |
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for (int i = 0; i < minBandValue.length; i++) { |
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scale[i] = 255D / (maxBandValue[i] - minBandValue[i]);
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offset[i] = (255D * minBandValue[i]) / (minBandValue[i] - maxBandValue[i]);
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} |
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nbands = stats.getBandCount(); |
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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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* Obtiene true si est? activado el flag de eliminar extremos y false si no lo
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* est?
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*/
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public Boolean getRemoveEnds() { |
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return new Boolean(removeEnds); |
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} |
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/**
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* Obtiene el porcentaje de recorte de colas aplicado o 0 si no tiene.
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* @return
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*/
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public Double getTailTrim(){ |
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return new Double(tailTrim); |
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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 IBuffer.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#getResult(java.lang.String)
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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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if (!exec)
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return this.raster; |
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return this.rasterResult; |
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} |
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return null; |
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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#getGroup()
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*/
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public String getGroup() { |
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return "radiometricos"; |
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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#getUIParams()
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*/
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public Params getUIParams(String nameFilter) { |
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Params params = new Params();
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params.setParam("RemoveEnds",
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new Boolean(removeEnds), |
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Params.CHECK, |
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null);
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params.setParam("TailTrim",
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new Double(Math.round(tailTrim * 100.0)), |
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Params.SLIDER, |
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new String[]{ "0", "100", "0", "1", "25" }); //min, max, valor defecto, intervalo peque?o, intervalo grande; |
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return params;
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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#post()
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*/
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public void post() { |
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// En caso de que nadie apunte a raster, se liberar? su memoria.
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raster = null;
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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#getInRasterDataType()
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*/
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public int getInRasterDataType() { |
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return 0; |
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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#process(int, int)
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*/
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public void process(int x, int y) { |
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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#getNames()
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*/
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public String[] getNames() { |
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return names;
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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#isVisible()
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*/
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public boolean isVisible() { |
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return true; |
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} |
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} |