root / trunk / libraries / libRaster / src / org / gvsig / raster / grid / filter / RasterFilter.java @ 15778
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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; |
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import java.util.Hashtable; |
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import java.util.TreeMap; |
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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.datastruct.Extent; |
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/**
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* Filtro para raster. Ancestro de todos los filtros.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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* @author Luis W. Sevilla (sevilla_lui@gva.es)
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*/
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public abstract class RasterFilter implements IRasterFilter, Cloneable { |
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protected IBuffer raster = null; |
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protected int height = 0; |
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protected int width = 0; |
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protected Hashtable params = new Hashtable(); |
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protected TreeMap environment = new TreeMap(); |
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protected Extent extent = null; |
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private int percent = 0; |
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private boolean canceled = false; |
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private String fName = ""; |
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/**
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* Variable que control la aplicaci?n o no del filtro. Si est? a false aunque est? en
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* la pila el filtro no se ejecutar?.
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*/
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protected boolean exec = true; |
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/**
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* Clase que representa un kernel de NxN p?xeles para realizar operaciones sobre
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* un pixel.
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public static class Kernel { |
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public double[][] kernel = null; |
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protected double divisor = 0; |
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/**
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* Constructor. Crea la matriz de datos para el kernel.
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* @param k datos del kernel
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*/
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public Kernel(double[][] k) { |
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this.kernel = k;
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for (int i = 0; i < kernel.length; i++) |
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for (int j = 0; j < kernel[0].length; j++) |
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divisor = divisor + kernel[i][j]; |
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} |
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/**
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* Constructor. Crea la matriz de datos para el kernel.
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* @param k datos del kernel
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*/
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public Kernel(double[][] k, double divisor) { |
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this.kernel = k;
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this.divisor = divisor;
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} |
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public double kernelOperation(Kernel k) { |
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double res = 0; |
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for (int i = 0; i < kernel.length; i++) |
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for (int j = 0; j < kernel[0].length; j++) |
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res += kernel[i][j] * k.kernel[i][j]; |
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return res;
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} |
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/**
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* Aplica la operaci?n de convoluci?n del kernel con otro kernel
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* pasado por par?metro
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* @param k
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* @return
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*/
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public double convolution(Kernel k) { |
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double res = this.kernelOperation(k); |
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if (this.divisor != 0) |
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res = res / divisor; |
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//return Math.abs(res);
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return res;
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} |
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public double getDivisor() { |
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return divisor;
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} |
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public void setDivisor(double divisor) { |
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this.divisor = divisor;
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} |
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/**
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* Obtiene el tama?o del kernel que viene dado por
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* el n?mero de pixeles de su lado.
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* @return
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*/
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public int getLado() { |
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return kernel.length;
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} |
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/**
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* Aplica ls operaci?n 0xff para todos los elementos del
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* kernel. Presupone que este es de tipo byte y no hace ninguna
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* comprobaci?n al respecto. Se deja en manos del usuario aplicar esta
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* operaci?n solo cuando los elementos del kernel sean de este tipo de dato.
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*/
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public void rgbNormalization() { |
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for (int i = 0; i < kernel.length; i++) |
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for (int j = 0; j < kernel[0].length; j++) |
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kernel[i][j] = ((byte)kernel[i][j]) & 0xff; |
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} |
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} |
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/**
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* Constructor
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*/
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public RasterFilter() {
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} |
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/**
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* Aplica el filtro sobre el raster pasado pixel a pixel
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* @throws InterruptedException
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*/
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public void execute() throws InterruptedException { |
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pre(); |
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percent = 0;
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if (exec) {
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for (int row = 0; row < height; row ++) { |
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for (int col = 0; col < width; col ++) |
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process(col, row); |
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if (Thread.currentThread().isInterrupted()) |
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throw new InterruptedException("Process execute Filter"); |
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percent = (row * 100) / height;
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} |
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} |
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if (isCanceled())
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return;
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percent = 100;
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post(); |
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} |
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/**
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* A?ade un par?metro al filtro
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*
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* @param name Clave del par?metro
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* @param param Objeto pasado como par?metro
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*/
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public void addParam(String name, Object param) { |
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if (param != null) |
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params.put(name, param); |
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else
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params.remove(name); |
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} |
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/**
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* Elimina un par?metro del filtro
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* @param name Clave del par?metro a eliminar
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*/
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public void removeParam(String name) { |
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params.remove(name); |
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} |
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/**
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* Obtiene un par?metro a partir de la clave
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* @param name Par?metro
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* @return Par?metro
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*/
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public Object getParam(String name) { |
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return params.get(name);
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} |
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/**
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* @param extent The extent to set.
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*/
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public void setExtent(Extent extent) { |
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this.extent = extent;
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} |
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/**
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* Obtiene true si el filtro va a ser ejecutado o false si no va a serlo
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* @return
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*/
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public boolean isExec() { |
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return exec;
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} |
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/**
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* Asigna el valor a la variable exec. Esta estar? a true si el filtro se ejecutar? la pr?xima
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* vez que se repinte o false si no se ejecuta.
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* @param exec
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*/
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public void setExec(boolean exec) { |
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this.exec = exec;
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} |
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/**
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* Establece si se ha de cancelar un proceso de filtrado o no.
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* @param value
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*/
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public void setCanceled(boolean value) { |
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canceled = value; |
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} |
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/**
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* Devuelve si se ha cancelado el proceso de filtrar.
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* @return
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*/
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public boolean isCanceled() { |
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return canceled;
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} |
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/**
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* Pone a cero el contador del porcentaje del proceso de filtrado
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* @return
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*/
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public void resetPercent() { |
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percent = 0;
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} |
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/**
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* Obtiene el porcentaje recorrido del proceso de filtrado
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* @return
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*/
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public int getPercent() { |
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return percent;
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} |
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/**
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* Funci?n que contiene el c?digo a ejecutar antes de aplicar el filtro
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*/
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abstract public void pre(); |
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/**
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* Funci?n que contiene el c?digo a ejecutar despues de aplicar el filtro
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*/
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abstract public void post(); |
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/**
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* Ejecuci?n del filtro para un pixel de la imagen
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*/
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abstract public void process(int x, int y); |
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/**
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* Obtiene el tipo de datos del raster de entrada
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*/
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abstract public int getInRasterDataType(); |
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/**
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* Obtiene el tipo de datos del raster de salida
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*/
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abstract public int getOutRasterDataType(); |
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/**
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* Obtiene el resultado del filtro despues de su ejecuci?n a trav?s de una clave
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* @param name clave para obtener un objeto resultado del filtro.
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*/
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abstract public Object getResult(String name); |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.grid.filter.IRasterFilter#getGroup()
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*/
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abstract public String getGroup(); |
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/**
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* Obtener que datos puede tratar una interfaz con sus valores
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* @param nameFilter. Cada tipo de filtro puede tener parametros distintos
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* @return
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*/
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abstract public Params getUIParams(String nameFilter); |
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/**
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* Obtener que las entradas que puede aperecer un filtro en el interfaz
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* @return
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*/
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abstract public String[] getNames(); |
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/**
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* Devolver? un booleano indicando si es visible o no en el panel de filtros.
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* @return
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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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/* (non-Javadoc)
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* @see java.lang.Object#clone()
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*/
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public Object clone() throws CloneNotSupportedException { |
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return super.clone(); |
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} |
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/**
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* Devuelve el nombre interno del filtro
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* @return the fName
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*/
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public String getName() { |
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return fName;
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} |
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/**
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* @param name the fName to set
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*/
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public void setName(String name) { |
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fName = name; |
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} |
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/**
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* Obtiene el TreeMap con los par?metros del entorno
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* @return TreeMap
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*/
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public TreeMap getEnv() { |
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return environment;
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} |
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/**
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* Asigna el TreeMap con los par?metros del entorno
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* @param env
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*/
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public void setEnv(TreeMap env) { |
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this.environment = env;
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} |
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} |