root / trunk / extensions / extRemoteSensing / src / org / gvsig / remotesensing / principalcomponents / PCStatisticsProcess.java @ 22761
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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 Instituto de Desarrollo Regional 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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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Iba?ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)
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* Campus Universitario s/n
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* 02071 Alabacete
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* Spain
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*
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* +34 967 599 200
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*/
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package org.gvsig.remotesensing.principalcomponents; |
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import org.gvsig.fmap.raster.layers.FLyrRasterSE; |
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import org.gvsig.raster.RasterProcess; |
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import org.gvsig.raster.buffer.BufferFactory; |
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import org.gvsig.raster.buffer.RasterBuffer; |
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import org.gvsig.raster.buffer.RasterBufferInvalidException; |
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import org.gvsig.raster.dataset.IRasterDataSource; |
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import org.gvsig.raster.grid.Grid; |
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import org.gvsig.raster.grid.GridException; |
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import org.gvsig.raster.util.RasterToolsUtil; |
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import Jama.EigenvalueDecomposition; |
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import Jama.Matrix; |
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import com.iver.andami.PluginServices; |
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/**
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* PCStatisticsProcess es la clase que implementa el proceso c?lculo de estad?sticas avanzado
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* para el an?lisis de componentes principales. Para la imagen y las bandas de entrada se calcula
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* la matriz de varianza-covarianza y los atovalores y autovectrores asociados .
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*
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* @author Alejandro Mu?oz Sanchez (alejandro.munoz@uclm.es)
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* @author Diego Guerrero Sevilla (diego.guerrero@uclm.es)
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* @version 19/10/2007
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*/
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public class PCStatisticsProcess extends RasterProcess{ |
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private Grid inputGrid = null; |
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private double autovalors[] = null; |
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private Matrix coVarMatrix = null; |
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private Matrix autoVectorMatrix = null; |
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private int percent = 0; |
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private boolean cancel = false; |
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private boolean selectedBands[] =null; |
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private FLyrRasterSE inputRasterLayer = null; |
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/**
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* Constructor
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*/
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public PCStatisticsProcess() {
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} |
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/**
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* C?lculo de la matriz de covarianza, autovalores y autovectores.
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*/
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public void calculate() { |
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//Calculo de matriz de covarianza:
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double coVar[][]= covarianceOptimize(); |
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// Calculo de autovectores:
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coVarMatrix = new Matrix(coVar);
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EigenvalueDecomposition eigenvalueDecomp = new EigenvalueDecomposition(coVarMatrix);
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//Autovectores
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autoVectorMatrix= eigenvalueDecomp.getV(); |
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// Autovalores
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autovalors= eigenvalueDecomp.getRealEigenvalues(); |
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} |
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/**
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* @return array con los autovalores
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*/
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public Object getResult() { |
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return autovalors;
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} |
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/**
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* @return Matriz de autovectores
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*/
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public Matrix getAutoVectorMatrix(){
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return autoVectorMatrix;
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} |
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/**
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* @return Matriz varianza-covarianza
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*/
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public Matrix getcoVarMatrix(){
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return coVarMatrix;
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} |
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/**
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* C?lculo de la matriz varianza covarianza de las bandas de un Grid.
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*/
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private double[][] covarianceOptimize() { |
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double dSum = 0; |
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int iValues = 0; |
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buildGrid(); |
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double[][] coV=new double[inputGrid.getRasterBuf().getBandCount()][inputGrid.getRasterBuf().getBandCount()]; |
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double cancelMatrix[][]= new double[][]{{0}}; |
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double valorBandai=0, valorBandaj=0; |
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int bandCount = inputGrid.getRasterBuf().getBandCount();
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if(inputGrid.getRasterBuf().getDataType() == RasterBuffer.TYPE_BYTE){
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// Se recorre el grid obener la matriz de cov
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for (int i = 0; i < bandCount; i++) { |
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for (int j = i; j < bandCount; j++) { |
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// si cancelado se devuelve cancelMatrix
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if(cancel)
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return cancelMatrix;
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iValues=0;
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dSum = 0;
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// Calculo covarianza entre las bandas i,j
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for (int k=0; k<inputGrid.getNX(); k++){ |
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for (int l=0;l<inputGrid.getNY();l++){ |
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try{
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inputGrid.setBandToOperate(i); |
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valorBandai=inputGrid.getCellValueAsByte(k,l) -inputGrid.getMeanValue(); |
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inputGrid.setBandToOperate(j); |
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valorBandaj=inputGrid.getCellValueAsByte(k,l) -inputGrid.getMeanValue(); |
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} catch (GridException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "grid_error"), this, e); |
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} |
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dSum += valorBandai*valorBandaj; |
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iValues++; |
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} |
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} |
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// Se asigna el valor a la matriz
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if (iValues>1) |
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coV[i][j]=dSum/(double)(iValues);
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else
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coV[i][j]= inputGrid.getNoDataValue(); |
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} |
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if (bandCount>1) |
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percent = (i+1)*100/(bandCount-1); |
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else
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percent= (i+1)*100/(1); |
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} |
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} // Fin tipo Byte
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if(inputGrid.getRasterBuf().getDataType() == RasterBuffer.TYPE_SHORT){
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// Se recorre el grid obener la matriz de cov
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for (int i = 0; i < bandCount; i++) { |
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for (int j = i; j < bandCount; j++) { |
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if(cancel)
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return cancelMatrix;
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iValues=0;
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dSum = 0;
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// Calculo covarianza entre las bandas i,j
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for (int k=0; k<inputGrid.getNX(); k++){ |
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for (int l=0;l<inputGrid.getNY();l++){ |
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try{
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inputGrid.setBandToOperate(i); |
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valorBandai=inputGrid.getCellValueAsShort(k,l) -inputGrid.getMeanValue(); |
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inputGrid.setBandToOperate(j); |
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valorBandaj=inputGrid.getCellValueAsShort(k,l) -inputGrid.getMeanValue(); |
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} catch (GridException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "grid_error"), this, e); |
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} |
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dSum += valorBandai*valorBandaj; |
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iValues++; |
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} |
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} |
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// Se asigna el valor a la matriz
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if (iValues>1) |
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coV[i][j]=dSum/(double)(iValues);
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else
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coV[i][j]= inputGrid.getNoDataValue(); |
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} |
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if (bandCount>1) |
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percent = (i+1)*100/(bandCount-1); |
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else
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percent= (i+1)*100/(1); |
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} |
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} // Fin tipo Short
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if(inputGrid.getRasterBuf().getDataType() == RasterBuffer.TYPE_INT){
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// Se recorre el grid obener la matriz de cov
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for (int i = 0; i < bandCount; i++) { |
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for (int j = i; j < bandCount; j++) { |
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if(cancel)
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return cancelMatrix;
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iValues=0;
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dSum = 0;
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// Calculo covarianza entre las bandas i,j
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for (int k=0; k<inputGrid.getNX(); k++){ |
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for (int l=0;l<inputGrid.getNY();l++){ |
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try{
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inputGrid.setBandToOperate(i); |
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valorBandai=inputGrid.getCellValueAsInt(k,l) -inputGrid.getMeanValue(); |
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inputGrid.setBandToOperate(j); |
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valorBandaj=inputGrid.getCellValueAsInt(k,l) -inputGrid.getMeanValue(); |
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} catch (GridException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "grid_error"), this, e); |
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} |
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dSum += valorBandai*valorBandaj; |
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iValues++; |
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} |
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} |
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// Se asigna el valor a la matriz
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if (iValues>1) |
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coV[i][j]=dSum/(double)(iValues);
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else
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coV[i][j]= inputGrid.getNoDataValue(); |
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} |
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if (bandCount>1) |
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percent = (i+1)*100/(bandCount-1); |
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else
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percent= (i+1)*100/(1); |
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} |
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} // Fin tipo Int
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if(inputGrid.getRasterBuf().getDataType() == RasterBuffer.TYPE_FLOAT){
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// Se recorre el grid obener la matriz de cov
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for (int i = 0; i < bandCount; i++) { |
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for (int j = i; j < bandCount; j++) { |
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if(cancel)
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return cancelMatrix;
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iValues=0;
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dSum = 0;
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// Calculo la covarianza entre las bandas i,j
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for (int k=0; k<inputGrid.getNX(); k++){ |
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for (int l=0;l<inputGrid.getNY();l++){ |
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try{
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inputGrid.setBandToOperate(i); |
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valorBandai=inputGrid.getCellValueAsFloat(k,l) -inputGrid.getMeanValue(); |
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inputGrid.setBandToOperate(j); |
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valorBandaj=inputGrid.getCellValueAsFloat(k,l) -inputGrid.getMeanValue(); |
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} catch (GridException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "grid_error"), this, e); |
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} |
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dSum += valorBandai*valorBandaj; |
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iValues++; |
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} |
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} |
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// Se asigna el valor a la matriz
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if (iValues>1) |
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coV[i][j]=dSum/(double)(iValues);
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else
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coV[i][j]= inputGrid.getNoDataValue(); |
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} |
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if (bandCount>1) |
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percent = (i+1)*100/(bandCount-1); |
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else
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percent= (i+1)*100/(1); |
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} |
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} // Fin tipo Float
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if(inputGrid.getRasterBuf().getDataType() == RasterBuffer.TYPE_DOUBLE){
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// Se recorre el grid obener la matriz de cov
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for (int i = 0; i < bandCount; i++) { |
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for (int j = i; j < bandCount; j++) { |
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if(cancel)
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return cancelMatrix;
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iValues=0;
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dSum = 0;
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// Calculo la covarianza entre las bandas i,j
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for (int k=0; k<inputGrid.getNX(); k++){ |
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for (int l=0;l<inputGrid.getNY();l++){ |
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try{
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inputGrid.setBandToOperate(i); |
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valorBandai=inputGrid.getCellValueAsDouble(k,l) -inputGrid.getMeanValue(); |
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inputGrid.setBandToOperate(j); |
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valorBandaj=inputGrid.getCellValueAsDouble(k,l) -inputGrid.getMeanValue(); |
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} catch (GridException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "grid_error"), this, e); |
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} |
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dSum += valorBandai*valorBandaj; |
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iValues++; |
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} |
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} |
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// Asigno el valor a la matriz
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if (iValues>1) |
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coV[i][j]=dSum/(double)(iValues);
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else
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coV[i][j]= inputGrid.getNoDataValue(); |
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} |
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if (bandCount>1) |
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percent = (i+1)*100/(bandCount-1); |
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else
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percent= (i+1)*100/(1); |
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} |
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} // Fin tipo Double
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for (int i = 0; i < bandCount; i++) { |
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for (int j = 0; j < bandCount; j++) { |
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if(j<i)
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coV[i][j]=coV[j][i]; |
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} |
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} |
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return coV;
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} |
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/**
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* Construye el grid con las bandas seleccionadas
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*/
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private void buildGrid(){ |
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IRasterDataSource dsetCopy = null;
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dsetCopy = inputRasterLayer.getDataSource().newDataset(); |
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BufferFactory bufferFactory = new BufferFactory(dsetCopy);
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if (!RasterBuffer.loadInMemory(dsetCopy))
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bufferFactory.setReadOnly(true);
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int longitud=0; |
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for (int i=0; i<selectedBands.length;i++) |
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if (selectedBands[i]) longitud++;
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int bands[]= new int[longitud]; |
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int j=0; |
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for (int i=0; i<selectedBands.length; i++) |
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if (selectedBands[i])
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{ bands[j]=i;
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j++; |
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} |
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try {
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inputGrid = new Grid(bufferFactory, bands);
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} catch (RasterBufferInvalidException e) {
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e.printStackTrace(); |
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} |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getLabel()
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*/
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public String getLabel() { |
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return PluginServices.getText(this,"procesando"); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getLog()
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*/
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public String getLog() { |
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return PluginServices.getText(this,"calculando_estadisticas")+"..."; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getPercent()
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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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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getTitle()
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*/
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public String getTitle() { |
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return PluginServices.getText(this,"principal_components"); |
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} |
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/**
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* @return grid
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*/
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public Grid getInputGrid() {
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return inputGrid;
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} |
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/**
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* @return raster de entrada
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* */
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public FLyrRasterSE getRasterLayer(){
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return inputRasterLayer;
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} |
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public void init() { |
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// Se toman los parametros del proceso
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selectedBands = (boolean []) getParam("selectedBands"); |
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inputRasterLayer = getLayerParam("layer");
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} |
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/**
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* Proceso de calculo de estadisticas para Principal Component
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* */
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public void process() throws InterruptedException { |
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double coVar[][]= covarianceOptimize(); |
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// Calculo de autovectores:
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coVarMatrix = new Matrix(coVar);
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EigenvalueDecomposition eigenvalueDecomp = new EigenvalueDecomposition(coVarMatrix);
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//Autovectores
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autoVectorMatrix= eigenvalueDecomp.getV(); |
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// Autovalores
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autovalors= eigenvalueDecomp.getRealEigenvalues(); |
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if(!cancel)
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if(incrementableTask!=null) |
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incrementableTask.processFinalize(); |
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if (externalActions!=null) |
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externalActions.end(autovalors); |
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} |
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public void interrupted() { |
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// TODO Auto-generated method stub
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} |
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} |