svn-gvsig-desktop / branches / v2_0_0_prep / extensions / extRasterTools-SE / src / org / gvsig / rastertools / vectorizacion / filter / GrayConversionPreviewRender.java @ 27629
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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) 2007 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.rastertools.vectorizacion.filter; |
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import org.gvsig.fmap.raster.layers.FLyrRasterSE; |
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import org.gvsig.gui.beans.imagenavigator.ImageUnavailableException; |
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import org.gvsig.raster.beans.previewbase.IPreviewRenderProcess; |
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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.io.RasterDriverException; |
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import org.gvsig.raster.filter.grayscale.GrayScaleManager; |
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import org.gvsig.raster.grid.filter.FilterTypeException; |
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import org.gvsig.raster.grid.filter.RasterFilterList; |
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import org.gvsig.raster.grid.filter.RasterFilterListManager; |
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import org.gvsig.raster.grid.filter.correction.MedianListManager; |
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import org.gvsig.raster.grid.filter.correction.ModeManager; |
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import org.gvsig.raster.grid.filter.enhancement.EnhancementStretchListManager; |
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import org.gvsig.raster.grid.filter.enhancement.LinearStretchParams; |
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import org.gvsig.raster.hierarchy.IRasterRendering; |
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import org.gvsig.raster.hierarchy.IStatistics; |
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import org.gvsig.raster.util.RasterToolsUtil; |
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/**
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* Clase para el renderizado de la vista previa en la conversi?n
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* a escala de grises.
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* 10/06/2008
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* @author Nacho Brodin nachobrodin@gmail.com
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*/
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public class GrayConversionPreviewRender implements IPreviewRenderProcess { |
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private boolean showPreview = false; |
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private FLyrRasterSE lyr = null; |
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private GrayConversionData data = null; |
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/**
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* Constructor.
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* @param lyr
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*/
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public GrayConversionPreviewRender(FLyrRasterSE lyr, GrayConversionData data) {
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this.lyr = lyr;
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this.data = data;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.beans.previewbase.IPreviewRenderProcess#process(org.gvsig.raster.hierarchy.IRasterRendering)
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*/
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public void process(IRasterRendering rendering) throws FilterTypeException, ImageUnavailableException { |
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if(!showPreview)
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throw new ImageUnavailableException(RasterToolsUtil.getText(this, "panel_preview_not_available")); |
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if(lyr == null) |
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throw new ImageUnavailableException(RasterToolsUtil.getText(this, "preview_not_available")); |
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RasterFilterList filterList = rendering.getRenderFilterList(); |
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RasterFilterListManager filterManager = new RasterFilterListManager(filterList);
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GrayScaleManager manager = new GrayScaleManager(filterManager);
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manager.addGrayScaleFilter(data.getBandType()); |
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addPosterization(filterManager, rendering); |
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addMode(filterManager, rendering); |
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addHighPass(filterManager, rendering); |
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addNoiseReduction(filterManager, rendering); |
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} |
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/**
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* A?ade el paso alto si la opci?n est? activa
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* @throws FilterTypeException
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*/
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private void addHighPass(RasterFilterListManager filterManager, IRasterRendering rendering) throws FilterTypeException { |
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if(data.isHighPassActive()) {
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} |
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} |
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/**
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* A?ade el filtro de moda si la opci?n est? activa
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* @throws FilterTypeException
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*/
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private void addMode(RasterFilterListManager filterManager, IRasterRendering rendering) throws FilterTypeException { |
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if(data.isModeActive()) {
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ModeManager mlm = new ModeManager(filterManager);
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mlm.addModeFilter(data.getModeThreshold()); |
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} |
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} |
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/**
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* A?ade el filtro de ruido si la opci?n est? activa
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* @throws FilterTypeException
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*/
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private void addNoiseReduction(RasterFilterListManager filterManager, IRasterRendering rendering) throws FilterTypeException { |
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if(data.isNoiseActive()) {
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MedianListManager mlm = new MedianListManager(filterManager);
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mlm.addMedianFilter(data.getNoiseThreshold()); |
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} |
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} |
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/**
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* A?ade la posterizaci?n si la opci?n est? activa
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* @throws FilterTypeException
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*/
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public void addPosterization(RasterFilterListManager filterManager, IRasterRendering rendering) throws FilterTypeException { |
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if(data.isPosterizationActive()) {
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EnhancementStretchListManager elm = new EnhancementStretchListManager(filterManager);
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LinearStretchParams leParams = new LinearStretchParams();
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//Obtenemos el m?ximo y el m?nimo para la banda
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IStatistics stats = lyr.getDataSource().getStatistics(); |
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double min = 0; |
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double max = 0; |
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try {
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stats.calcFullStatistics(); |
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if(lyr.getDataType()[0] == IBuffer.TYPE_BYTE) { |
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min = 0;
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max = 255;
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} else if(data.getBandFromBandType() < 3) { |
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min = stats.getMin()[data.getBandFromBandType()]; |
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max = stats.getMax()[data.getBandFromBandType()]; |
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} else if(data.getBandFromBandType() == 3) { |
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min = Math.min(Math.min(stats.getMin()[0], stats.getMin()[1]), stats.getMin()[2]); |
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max = Math.max(Math.max(stats.getMax()[0], stats.getMax()[1]), stats.getMax()[2]); |
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} |
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} catch (InterruptedException e) { |
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return;
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} catch (RasterDriverException e) {
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return;
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} catch (FileNotOpenException e) {
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return;
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} |
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//Creamos arrays de entrada y salida
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double[] in = new double[(data.getPosterizationLevels() - 1) * 2 + 4]; |
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int[] out = new int[(data.getPosterizationLevels() - 1) * 2 + 4]; |
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double lastIn = 0, lastOut = 0; |
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//Inicializamos los valores de los extremos
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lastIn = in[0] = in[1] = min; |
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lastOut = out[0] = out[1] = 0; |
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in[in.length - 1] = in[in.length - 2] = max; |
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out[out.length - 1] = out[out.length - 2] = 255; |
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//Construimos el array de salida
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int nPieces = data.getPosterizationLevels() -1; |
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int n = 0; |
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int increment = 255 / nPieces; |
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for (int i = 3; i < in.length - 2; i++) { |
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if((i % 2) != 0) { |
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out[i] = (int)Math.round(lastOut + increment); |
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lastOut = (int)out[i];
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} else
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out[i] = (int)lastOut;
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n++; |
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} |
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//Construimos el array de entrada
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//En caso de ser conversi?n a B/W se asigna el valor de umbral para la posterizaci?n
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if(data.getPosterizationLevels() == 2) { |
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in[2] = in[3] = lastIn + ((data.getPosterizationThreshold() * (max - min)) / 255); |
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} else {
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for (int i = 2; i < in.length - 2; i = i + 2) { |
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in[i] = in[i + 1] = lastIn + ((max - min) / data.getPosterizationLevels());
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lastIn = (int)in[i];
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} |
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} |
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//Creamos y a?adimos el filtro
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leParams.rgb = (lyr.getDataType()[0] == IBuffer.TYPE_BYTE);
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leParams.red.stretchIn = in; |
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leParams.red.stretchOut = out; |
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leParams.green.stretchIn = in; |
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leParams.green.stretchOut = out; |
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leParams.blue.stretchIn = in; |
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leParams.blue.stretchOut = out; |
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elm.addEnhancedStretchFilter(leParams, |
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lyr.getDataSource().getStatistics(), |
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rendering.getRenderBands(), |
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false);
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} |
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} |
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/**
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* Obtiene el flag que informa de si se est? mostrando la previsualizaci?n o no.
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* En caso de no mostrarse se lanza una excepci?n ImageUnavailableExcepcion con el
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* mensaje "La previsualizaci?n no est? disponible para este panel"
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* @return
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*/
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public boolean isShowPreview() { |
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return showPreview;
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} |
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/**
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* Asigna el flag para mostrar u ocultar la preview. En caso de no mostrarse se lanza una
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* excepci?n ImageUnavailableExcepcion con el mensaje "La previsualizaci?n no est? disponible para
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* este panel"
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* @param showPreview
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*/
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public void setShowPreview(boolean showPreview) { |
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this.showPreview = showPreview;
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} |
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} |