root / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / enhancement / LinearStretchEnhancementFilter.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) 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.buffer.cache.RasterReadOnlyBuffer; |
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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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import org.gvsig.raster.grid.filter.enhancement.LinearStretchParams.Stretch; |
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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 LinearStretchEnhancementFilter extends RasterFilter { |
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protected double[][] scale = null; |
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protected double[][] offset = null; |
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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 int[] renderBands = null; |
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public static String[] names = new String[] {"enhanced_stretch"}; |
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private boolean removeEnds = false; |
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protected LinearStretchParams stretchs = null; |
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protected Stretch[] scaleOffsetList = null; |
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/**
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* Construye un LinearEnhancementFilter
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*/
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public LinearStretchEnhancementFilter() {
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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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stretchs = (LinearStretchParams) params.get("stretchs");
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if (params.get("remove") != null) |
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removeEnds = ((Boolean) params.get("remove")).booleanValue(); |
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if (stretchs == null) |
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return;
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renderBands = (int[]) params.get("renderBands"); |
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if (renderBands == null) |
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renderBands = new int[0]; |
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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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if (raster.getDataType() != IBuffer.TYPE_BYTE)
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stretchs.rgb = false;
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stretchs.setMaxMin(stats, renderBands); |
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if (removeEnds)
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stretchs.applyRemoveEndsToStretchs(stats, renderBands); |
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stretchs.loadTailTrimValues(stats); |
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if (stretchs.hasTailTrim())
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stretchs.applyTrimToStretchs(); |
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stretchs.calcLinearScaleAndOffset(); |
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loadStretchList(); |
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if(raster instanceof RasterReadOnlyBuffer) |
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((RasterReadOnlyBuffer) raster).addDrawableBands(renderBands); |
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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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* La lista de escalas y desplazamientos es un array de 3 elementos en el que
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* cada posici?n es un objeto Stretch con la escala y desplazamiento de la
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* banda que se dibuja en esa posici?n. El objetivo es aplicar a cada banda
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* el m?ximo y m?nimo que le corresponde. Por ejemplo, cuando tenemos una imagen de
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* 3 bandas de tipo short y queremos visualizar en RGB solo la primera banda entonces
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* escaleOffsetList tendr? stretchs.red en las 3 posiciones.
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*/
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private void loadStretchList() { |
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scaleOffsetList = new Stretch[3]; |
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scaleOffsetList[0] = stretchs.red;
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scaleOffsetList[1] = stretchs.green;
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scaleOffsetList[2] = stretchs.blue;
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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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double[] tailTrimList; |
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if (stretchs != null) |
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tailTrimList = stretchs.getTailTrimList(); |
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else
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tailTrimList = new double[0]; |
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double median = 0; |
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double nValues = 0; |
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for (int i = 0; i < tailTrimList.length; i++) { |
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median += tailTrimList[i]; |
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if(nValues != 0) |
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nValues ++; |
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} |
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return new Double(nValues > 0 ? median / nValues : median); |
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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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* 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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* (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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if(stretchs == null) |
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stretchs = (LinearStretchParams) this.params.get("stretchs"); |
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Params params = new Params();
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params.setParam("TailTrim",
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new Double(Math.round(getTailTrim().doubleValue() * 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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params.setParam("StretchInRed",
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stretchs.red.stretchIn, |
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Params.CHOICE, |
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null);
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params.setParam("StretchInGreen",
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stretchs.green.stretchIn, |
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Params.CHOICE, |
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null);
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params.setParam("StretchInBlue",
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stretchs.blue.stretchIn, |
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Params.CHOICE, |
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null);
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params.setParam("StretchOutRed",
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stretchs.red.stretchOut, |
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Params.CHOICE, |
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null);
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params.setParam("StretchOutGreen",
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stretchs.green.stretchOut, |
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Params.CHOICE, |
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null);
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params.setParam("StretchOutBlue",
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stretchs.blue.stretchOut, |
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Params.CHOICE, |
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null);
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params.setParam("TailTrimRedMin",
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new Double(stretchs.red.tailTrimMin), |
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Params.CHOICE, |
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null);
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params.setParam("TailTrimRedMax",
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new Double(stretchs.red.tailTrimMax), |
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Params.CHOICE, |
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null);
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params.setParam("TailTrimGreenMin",
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new Double(stretchs.green.tailTrimMin), |
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Params.CHOICE, |
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null);
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params.setParam("TailTrimGreenMax",
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new Double(stretchs.green.tailTrimMax), |
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Params.CHOICE, |
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null);
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params.setParam("TailTrimBlueMin",
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new Double(stretchs.blue.tailTrimMin), |
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Params.CHOICE, |
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null);
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params.setParam("TailTrimBlueMax",
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new Double(stretchs.blue.tailTrimMax), |
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Params.CHOICE, |
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null);
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params.setParam("Remove",
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new Boolean(removeEnds), |
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Params.CHOICE, |
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null);
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if(renderBands == null) |
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renderBands = (int[]) this.params.get("renderBands"); |
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params.setParam("RenderBands",
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convertArrayToString(renderBands), |
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Params.NONE, |
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null);
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params.setParam("RGB",
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new Boolean(stretchs.rgb), |
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Params.NONE, |
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null);
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return params;
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} |
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/**
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* Convierte un array de dobles a una cadena
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* @param values
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* @return
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*/
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private String convertArrayToString(int[] values) { |
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StringBuffer buffer = new StringBuffer(); |
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for (int i = 0; i < values.length; i++) { |
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buffer.append(values[i]); |
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if (i < (values.length - 1)) |
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buffer.append(" ");
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} |
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return buffer.toString();
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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) throws InterruptedException { |
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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 false; |
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} |
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/**
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* @return the stretchs
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*/
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public LinearStretchParams getStretchs() {
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return stretchs;
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} |
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} |