root / trunk / extensions / extGeoreferencing / src / org / gvsig / georeferencing / process / geotransform / GeoTransformProcess.java @ 20914
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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.georeferencing.process.geotransform; |
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import org.gvsig.raster.RasterProcess; |
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import org.gvsig.raster.datastruct.GeoPoint; |
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import org.gvsig.raster.util.RasterToolsUtil; |
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import Jama.Matrix; |
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/**
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* Clase que representa una transformacion polinomial para la convertir las
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* coordenadas de una imagen en la imagen rectificada.
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*
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*
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* @author Alejandro Mu?oz Sanchez (alejandro.munoz@uclm.es)
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* @version 20/1/2008
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**/
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public class GeoTransformProcess extends RasterProcess { |
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// Lista de puntos de control.
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private GeoPoint gpcs[]= null; |
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// porcentage del proceso global de la tarea
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private int percent=0; |
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// orden del polinomio aproximador
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protected int orden = 0; |
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// numero minimo de puntos
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protected int minGPC=0; |
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// Lista con los valores de las potencias de x e y
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private int exp[][] = null; |
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// rms total en las x
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private double rmsXTotal=0; |
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// rms total en las y
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private double rmsYTotal=0; |
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// rms total
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private double rmsTotal=0; |
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GeoTransformDataResult resultData= null;
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//coeficientes polinomios conversion coordenadas reales a coordenadas pixel
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private double mapToPixelCoefX[]= null; |
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private double mapToPixelCoefY[]=null; |
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//coeficientes polinomio conversion coordenadas pixel a coordenadas reales
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private double pixelToMapCoefX[]= null; |
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private double pixelToMapCoefY[]=null; |
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/**
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* Metodo que recoge los parametros del proceso de transformaci?n
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* <LI>gpcs: lista de puntos de control</LI>>
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* <LI> orden: orden del polinomio de transformacion </LI>
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*/
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public void init() { |
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gpcs = (GeoPoint[])getParam("gpcs"); |
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orden= (int)getIntParam("orden"); |
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minGPC = (orden+1)*(orden+2)/2; |
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exp = new int[minGPC][2]; |
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resetErrors(); |
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resultData= new GeoTransformDataResult();
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// Chequear si el numero de puntos es suficiente para determinar la transformacion de orden n.
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if(!enoughPoints()){
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minGPC=0;
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} |
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} |
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/**
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* Inicializa los valores de los errores a 0
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*/
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private void resetErrors() { |
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for (int i = 0; i < gpcs.length; i++) |
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gpcs[i].resetErrors(); |
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} |
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/**
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* @return true si se proporciona el numero minimo de puntos de entrada
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* para la transformaci?n de orden seleccionado. false en caso contrario.
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* */
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public boolean enoughPoints() { |
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return (gpcs.length>=minGPC);
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} |
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/**
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* Obtiene el resultado del proceso.
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* @return
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*/
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public Object getResult() { |
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return resultData;
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} |
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/**
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* Proceso
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**/
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public void process() { |
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if(minGPC > 0) { |
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// Obtencion los polinomios de transformaci?n
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calculatePolinomialCoefs(); |
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// calculo de los resultados
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calculateRMSerror(); |
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// Se almacenan los resultados en dataResult
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resultData.setGpcs(gpcs); |
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resultData.setPixelToMapCoefX(pixelToMapCoefX); |
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resultData.setPixelToMapCoefY(pixelToMapCoefY); |
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resultData.setMapToPixelCoefX(mapToPixelCoefX); |
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resultData.setMapToPixelCoefY(mapToPixelCoefY); |
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resultData.setRmsXTotal(rmsXTotal); |
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resultData.setRmsYTotal(rmsYTotal); |
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resultData.setRmsTotal(rmsTotal); |
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resultData.setPolynomialOrden(orden); |
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if(externalActions!=null) |
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externalActions.end(resultData); |
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return;
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} |
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resultData = null;
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} |
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/**
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* Calculo de los coeficientes de los polinomios de aproximacion.
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* */
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public void calculatePolinomialCoefs(){ |
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double matrixD[][]= new double [minGPC][minGPC]; |
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double matrixD2[][]= new double [minGPC][minGPC]; |
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double result[]= new double[minGPC]; |
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double result2[]= new double[minGPC]; |
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double result3[]= new double[minGPC]; |
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double result4[]= new double[minGPC]; |
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int k=-1; |
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// Obtencion de la primera fila de la matriz
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for (int filas=0; filas<minGPC;filas++) |
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{ k=-1;
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for (int i=0; i<=orden; i++) |
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for(int j=0; j<=i; j++){ |
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k++; |
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for(int v=0; v<gpcs.length;v++){ |
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if(gpcs[v].active){
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matrixD[filas][k]+=(Math.pow(gpcs[v].pixelPoint.getX(),i-j)* Math.pow(gpcs[v].pixelPoint.getX(),exp[filas][0])) |
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* (Math.pow(gpcs[v].pixelPoint.getY(),j)* Math.pow(gpcs[v].pixelPoint.getY(),exp[filas][1])); |
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matrixD2[filas][k]+=(Math.pow(gpcs[v].mapPoint.getX(),i-j)* Math.pow(gpcs[v].mapPoint.getX(),exp[filas][0])) |
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* (Math.pow(gpcs[v].mapPoint.getY(),j)* Math.pow(gpcs[v].mapPoint.getY(),exp[filas][1])); |
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} |
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} |
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// Para la fila 0 se guardan los exponentes
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if(filas==0){ |
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exp[k][0]=i-j;
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exp[k][1]=j;
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// Se calcula el resultado de !!!!!
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for(int v=0; v<gpcs.length;v++){ |
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if(gpcs[v].active){
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result[k]+=(Math.pow(gpcs[v].pixelPoint.getX(),i-j)* Math.pow(gpcs[v].pixelPoint.getX(),exp[filas][0])) |
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* (Math.pow(gpcs[v].pixelPoint.getY(),j)* Math.pow(gpcs[v].pixelPoint.getY(),exp[filas][1]))*gpcs[v].mapPoint.getY(); |
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result2[k]+=(Math.pow(gpcs[v].mapPoint.getX(),i-j)* Math.pow(gpcs[v].mapPoint.getX(),exp[filas][0])) |
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* (Math.pow(gpcs[v].mapPoint.getY(),j)* Math.pow(gpcs[v].mapPoint.getY(),exp[filas][1]))*gpcs[v].pixelPoint.getY(); |
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result3[k]+=(Math.pow(gpcs[v].pixelPoint.getX(),i-j)* Math.pow(gpcs[v].pixelPoint.getX(),exp[filas][0])) |
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* (Math.pow(gpcs[v].pixelPoint.getY(),j)* Math.pow(gpcs[v].pixelPoint.getY(),exp[filas][1]))*gpcs[v].mapPoint.getX(); |
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result4[k]+=(Math.pow(gpcs[v].mapPoint.getX(),i-j)* Math.pow(gpcs[v].mapPoint.getX(),exp[filas][0])) |
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* (Math.pow(gpcs[v].mapPoint.getY(),j)* Math.pow(gpcs[v].mapPoint.getY(),exp[filas][1]))*gpcs[v].pixelPoint.getX(); |
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} |
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} |
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} |
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} |
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} |
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Matrix matrixResult= new Matrix(matrixD);
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Matrix matrixResult2= new Matrix(matrixD2);
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pixelToMapCoefY=solveSystem(matrixResult,result); |
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mapToPixelCoefY= solveSystem(matrixResult2,result2); |
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pixelToMapCoefX=solveSystem(matrixResult,result3); |
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mapToPixelCoefX= solveSystem(matrixResult2,result4); |
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} |
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/**
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* @return array con la solucion al sistema de ecuadiones.
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* */
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public double[] solveSystem(Matrix matrix, double columResult[]){ |
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double xCoef []= new double[minGPC]; |
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double [][]a= new double[columResult.length][1]; |
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for (int i=0; i<columResult.length;i++) |
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a[i][0]=columResult[i];
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Matrix c=null;
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if(matrix.det()==0.0){ |
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// Resolucion del sistema usando la libreria flanagan
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flanagan.math.Matrix matrixFL= new flanagan.math.Matrix(matrix.getArray());
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xCoef= matrixFL.solveLinearSet(columResult); |
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} |
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else{
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c= matrix.solve(new Matrix(a));
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for (int i=0; i<columResult.length;i++) |
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xCoef[i]=c.get(i,0);
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} |
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return xCoef;
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} |
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/**
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* @return vector con los RMS
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* */
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public void calculateRMSerror() { |
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int numgpcs= gpcs.length;
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double rmsxTotal=0; |
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double rmsyTotal=0; |
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rmsTotal=0;
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int num=0; |
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for(int im_point = 0; im_point < numgpcs; im_point++) { |
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if (gpcs[im_point].active)
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{
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double tmp[]= getCoordMap(gpcs[im_point].pixelPoint.getX(),gpcs[im_point].pixelPoint.getY()); |
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double tmp2[]= getCoordPixel(tmp[0],tmp[1]); |
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gpcs[im_point].setEvaluateX(tmp2[0]);
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gpcs[im_point].setEvaluateY(tmp2[1]);
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gpcs[im_point].setErrorX(Math.pow(gpcs[im_point].getEvaluateX() - gpcs[im_point].pixelPoint.getX(), 2)); |
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rmsxTotal += gpcs[im_point].getErrorX(); |
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gpcs[im_point].setErrorY(Math.pow(gpcs[im_point].getEvaluateY() - gpcs[im_point].pixelPoint.getY(), 2)); |
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rmsyTotal +=gpcs[im_point].getErrorY(); |
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gpcs[im_point].setRms(Math.sqrt(gpcs[im_point].getErrorX() +gpcs[im_point].getErrorY()));
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rmsTotal += gpcs[im_point].getRms(); |
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num++; |
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} |
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} |
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this.rmsTotal =Math.sqrt( rmsTotal / num); |
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this.rmsXTotal = Math.sqrt(rmsxTotal / num); |
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this.rmsYTotal = Math.sqrt(rmsyTotal / num); |
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} |
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/**
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* @return error total para la coordenada X
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* */
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public double getRMSx(){ |
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return rmsXTotal;
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} |
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/**
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* @return error total para la coordenada y
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* */
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public double getRMSy() { |
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return rmsYTotal;
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} |
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/**
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* @return error total
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* */
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public double getRMSTotal() { |
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return rmsTotal;
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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 RasterToolsUtil.getText(this, "transformacion"); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.RasterProcess#getLog()
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*/
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public String getLog() { |
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return RasterToolsUtil.getText(this, "calculando_transformacion"); |
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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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* Funci?n que evalua el polinomio de transformaci?n para obtener las coordenadas
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* reales de unas coordenadas pixeles que se pasan como parametros.
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* @param x coordenada x del punto
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* @param y coordenada y del punto
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* @return resultado de la evaluaci?n para x e y
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* */
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public double[] getCoordMap(double x, double y){ |
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//setExpPolinomial();
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double eval[]= new double [2]; |
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for(int i=0; i<pixelToMapCoefX.length;i++) |
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{
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eval[0]+=pixelToMapCoefX[i] * Math.pow(x, exp[i][0]) * Math.pow(y,exp[i][1]); |
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eval[1]+=pixelToMapCoefY[i] * Math.pow(x, exp[i][0]) * Math.pow(y, exp[i][1]); |
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} |
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return eval;
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} |
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/**
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* Funci?n que evalua el polinomio de transformaci?n para obtener las coordenadas
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* pixeles de unas coordenadas mapa en un proceso de transformacion.
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* @param x coordenada x del punto
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* @param y coordenada y del punto
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* @return resultado de la evaluaci?n para x e y
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* */
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public double[] getCoordPixel(double x, double y){ |
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//setExpPolinomial();
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double eval[]= new double [2]; |
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for(int i=0; i<pixelToMapCoefX.length;i++) |
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{
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eval[0]+=mapToPixelCoefX[i] * Math.pow(x, exp[i][0]) * Math.pow(y,exp[i][1]); |
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eval[1]+=mapToPixelCoefY[i] * Math.pow(x, exp[i][0]) * Math.pow(y, exp[i][1]); |
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} |
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return eval;
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} |
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/*private void setExpPolinomial(){
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if(exp==null)
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{
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int minGPC=(orden+1)*(orden+2)/2;
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exp=new int[minGPC][2];
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int k=-1;
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for (int i=0; i<=orden; i++){
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for(int j=0; j<=i; j++){
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k++;
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exp[k][0]=i-j;
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exp[k][1]=j;
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}
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}
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}
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}*/
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} |
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