svn-gvsig-desktop / trunk / libraries / libCq CMS for java.old / src / org / cresques / io / raster / LinearEnhancementFilter.java @ 4578
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/*
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* Cresques Mapping Suite. Graphic Library for constructing mapping applications.
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*
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* Copyright (C) 2004-5.
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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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* cresques@gmail.com
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*/
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package org.cresques.io.raster; |
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import java.io.File; |
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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 clase
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* RasterStats que ser?n calculados por PercentTailTrimFilter o ComputeMinMaxFilter dependiendo
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* de si est? activado el recorte de colas o no. En RasterStats tambi?n est?n los segundos
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* valores despu?s del m?nimo y m?ximo que son los que se utilizan con la opci?n eliminar
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* extremos activada. Estos se usaran en vez del m?nimo y m?ximo cuando la variable
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* removeExtrema est? a true.
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* @author Nacho Brodin (brodin_ign@gva.es)
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*/
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public abstract 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 int[] minBandValue = null; |
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protected int[] maxBandValue = null; |
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protected boolean removeExtrema = false; |
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protected String filename = null; |
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/**
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* Constructor
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*
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*/
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public LinearEnhancementFilter() {
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super();
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} |
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/* (non-Javadoc)
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* @see org.cresques.io.raster.IRasterFilter#pre()
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*/
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public void pre() { |
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if (removeExtrema) { //Si est? activado eliminar extremos gastamos el 2? m?ximo/m?nimo |
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if ((filename != null) && !filename.equals("")) { |
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for (int i = 0; i < stats.history.size(); i++) { |
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RasterStats.History history = (RasterStats.History) stats.history.get(i); |
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if (history.file.equals(filename.substring((filename.lastIndexOf(File.separator) + |
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1),
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filename.length()))) {
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this.minBandValue = history.secMin;
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this.maxBandValue = history.secMax;
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} |
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} |
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} |
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if ((this.minBandValue == null) || (this.maxBandValue == null)) { |
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this.minBandValue = stats.secondMinBandValue;
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this.maxBandValue = stats.secondMaxBandValue;
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} |
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} else { //Si no est? activado eliminar extremos |
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if ((filename != null) && !filename.equals("")) { |
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for (int i = 0; i < stats.history.size(); i++) { |
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RasterStats.History history = (RasterStats.History) stats.history.get(i); |
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if (history.file.equals(filename.substring((filename.lastIndexOf(File.separator) + |
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1),
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filename.length()))) {
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this.minBandValue = history.min;
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this.maxBandValue = history.max;
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} |
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} |
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} |
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if ((this.minBandValue == null) || (this.maxBandValue == null)) { |
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this.minBandValue = stats.minBandValue;
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this.maxBandValue = stats.maxBandValue;
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} |
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} |
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for (int i = 0; i < 3; i++) { |
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scale[i] = 255D / (maxBandValue[i] - minBandValue[i]);
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offset[i] = (255D * minBandValue[i]) / (minBandValue[i] -
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maxBandValue[i]); |
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} |
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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 est?
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*/
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public Boolean getRemoveExtrema() { |
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return new Boolean(removeExtrema); |
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} |
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} |