root / trunk / libraries / libRaster / src / org / gvsig / raster / dataset / properties / DatasetStatistics.java @ 11207
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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.dataset.properties; |
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import java.io.File; |
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import java.util.Date; |
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import java.util.Hashtable; |
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import org.gvsig.raster.RasterLibrary; |
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import org.gvsig.raster.dataset.FileNotOpenException; |
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import org.gvsig.raster.dataset.IBuffer; |
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import org.gvsig.raster.dataset.IStatistics; |
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import org.gvsig.raster.dataset.InvalidSetViewException; |
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import org.gvsig.raster.dataset.RasterDataset; |
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import org.gvsig.raster.dataset.RasterDriverException; |
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/**
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* Estadisticas asociadas a un fichero raster.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class DatasetStatistics implements IStatistics{ |
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/*
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* Esta a false si las estadisticas no son del fichero completo. Esto es posible porque podemos
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* tener unas estad?sticas calculadas a partir de una petici?n con subsampleo. Hay que tener en
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* cuenta que el raster puede ser muy grande y este calculo muy costoso.
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*/
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protected boolean complete = false; |
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protected double[] max = null; |
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protected double[] min = null; |
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protected double[] secondMax = null; |
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protected double[] secondMin = null; |
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protected double[] mean = null; |
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protected double[] variance = null; |
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protected String fName = null; |
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protected RasterDataset grf = null; |
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protected boolean calculated = false; |
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protected Hashtable tailTrim = new Hashtable(); |
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private boolean canceled = false; |
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/**
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* Constructor. Asigna el fichero asociado.
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*/
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public DatasetStatistics(RasterDataset grf){
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this.grf = grf;
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} |
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/**
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* Asigna el valor m?ximo del grid
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* @return Valor m?ximo
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*/
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public void setMax(double[] max) { |
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this.max = max;
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} |
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/**
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* Asigna el valor del segundo m?ximo
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* @return Valor del segundo m?ximo
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*/
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public void setSecondMax(double[] smax) { |
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this.secondMax = smax;
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} |
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/**
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* Asigna el valor m?dio del grid
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* @return Valor medio
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*/
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public void setMean(double[] mean) { |
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this.mean = mean;
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} |
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/**
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* Asigna el valor m?ximo del grid
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* @return Valor m?nimo
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*/
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public void setMin(double[] min) { |
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this.min = min;
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} |
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/**
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* Asigna el valor del segundo m?nimo
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* @return Valor del segundo m?nimo
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*/
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public void setSecondMin(double[] smin) { |
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this.secondMin = smin;
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} |
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/**
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* Asigna la varianza
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* @return Varianza
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*/
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public void setVariance(double[] variance) { |
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this.variance = variance;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getMax()
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*/
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public double[] getMax() { |
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return max;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getSecondMax()
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*/
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public double[] getSecondMax() { |
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return secondMax;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getSecondMin()
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*/
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public double[] getSecondMin() { |
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return secondMin;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getMaximun()
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*/
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public double getMaximun(){ |
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double m = Double.MIN_VALUE; |
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for(int i = 0; i < max.length; i++) |
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m = Math.max(m, max[i]);
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return m;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getMinimun()
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*/
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public double getMinimun(){ |
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double m = Double.MAX_VALUE; |
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for(int i = 0; i < min.length; i++) |
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m = Math.min(m, min[i]);
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return m;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getMean()
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*/
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public double[] getMean() { |
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return mean;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getMin()
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*/
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public double[] getMin() { |
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return min;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getVariance()
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*/
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public double[] getVariance() { |
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return variance;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getBandCount()
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*/
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public int getBandCount(){ |
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return grf.getBandCount();
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#calcFullStatistics()
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*/
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public void calcFullStatistics() throws FileNotOpenException, RasterDriverException{ |
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long t2;
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long t1 = new Date().getTime(); |
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int type = grf.getDataType();
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max = new double[grf.getBandCount()]; |
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min = new double[grf.getBandCount()]; |
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secondMax = new double[grf.getBandCount()]; |
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secondMin = new double[grf.getBandCount()]; |
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mean = new double[grf.getBandCount()]; |
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variance = new double[grf.getBandCount()]; |
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long[] iValues = new long[grf.getBandCount()]; |
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boolean[] init = new boolean[grf.getBandCount()]; |
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byte[][][] b = null; |
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short[][][] s = null; |
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int[][][] i = null; |
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float[][][] f = null; |
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double[][][] d = null; |
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for (int iBand = 0; iBand < grf.getBandCount(); iBand ++) { |
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max[iBand] = Double.MIN_VALUE;
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min[iBand] = Double.MAX_VALUE;
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secondMax[iBand] = Double.MIN_VALUE;
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secondMin[iBand] = Double.MAX_VALUE;
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init[iBand] = true;
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} |
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int h = RasterLibrary.blockHeight;
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for (int block = 0; block < grf.getHeight(); block += h) { |
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Object buf = null; |
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try {
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buf = grf.readBlock(block, RasterLibrary.blockHeight); |
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} catch (InvalidSetViewException e) {
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//La vista se asigna autom?ticamente
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} |
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switch(type){
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case IBuffer.TYPE_BYTE: b = (byte[][][])buf;break; |
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case IBuffer.TYPE_SHORT: s = (short[][][])buf;break; |
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case IBuffer.TYPE_INT: i = (int[][][])buf;break; |
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case IBuffer.TYPE_FLOAT: f = (float[][][])buf;break; |
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case IBuffer.TYPE_DOUBLE: d = (double[][][])buf;break; |
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} |
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int hB = RasterLibrary.blockHeight;
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if((block + hB) > grf.getHeight())
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hB = Math.abs(grf.getHeight() - block);
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for (int iBand = 0; iBand < grf.getBandCount(); iBand ++) { |
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for (int row = 0; row < hB; row++) { |
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for (int col = 0; col < grf.getWidth(); col ++) { |
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double z = (b != null) ? (b[iBand][row][col] & 0xff) : ((s != null) ? (s[iBand][row][col] & 0xffff) : ((i != null) ? (i[iBand][row][col] & 0xffffff) : (f != null) ? f[iBand][row][col] : d[iBand][row][col])); |
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if (init[iBand]){
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min[iBand] = z; |
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secondMin[iBand] = z; |
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max[iBand] = z; |
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secondMax[iBand] = z; |
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init[iBand] = false;
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continue;
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} |
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if ( min[iBand] > z ){
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secondMin[iBand] = min[iBand]; |
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min[iBand] = z; |
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} |
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if ( secondMin[iBand] == min[iBand] && min[iBand] < z)
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secondMin[iBand] = z; |
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if ( max[iBand] < z ){
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secondMax[iBand] = max[iBand]; |
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max[iBand] = z; |
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} |
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if ( secondMax[iBand] == max[iBand] && max[iBand] > z)
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secondMax[iBand] = z; |
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mean[iBand] += z; |
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variance[iBand] += z * z; |
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iValues[iBand]++; |
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} |
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if (isCanceled())
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return;
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} |
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} |
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} |
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for (int iBand = 0; iBand < grf.getBandCount(); iBand ++) { |
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if( iValues[iBand] > 0 ) { |
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mean[iBand] /= (double) iValues[iBand];
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variance[iBand] = variance[iBand] / (double) iValues[iBand] - mean[iBand] * mean[iBand];
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} |
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} |
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calculated = true;
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t2 = new Date().getTime(); |
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System.out.println("Estadisticas " + grf.getFName() + ": " + ((t2 - t1) / 1000D) + ", secs."); |
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} |
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/**
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* Carga estadisticas desde el fichero Rmf si las hay.
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* @param fName Nombre del fichero
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*/
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public void loadFromRmf(){ |
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if(grf != null){ |
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File f = new File(grf.getFName()); |
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if(!f.exists())
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return;
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//calculated = true;
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//TODO: FUNCIONALIDAD: Carga de estad?sticas rmf
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} |
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} |
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/**
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* Salva estad?sticas a fichero rmf.
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* @param fName
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*/
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public void saveToRmf(){ |
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//TODO: FUNCIONALIDAD: Salvado de estad?sticas a rmf
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#isCalculated()
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*/
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public boolean isCalculated() { |
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return calculated;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#setTailTrimValue(double, java.lang.Object)
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*/
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public void setTailTrimValue(double percent, Object valueByBand){ |
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String s = new Double(percent).toString(); |
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tailTrim.put(s, valueByBand); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.driver.IStatistics#getTailTrimValue(double)
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*/
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public Object getTailTrimValue(double percent){ |
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String s = new Double(percent).toString(); |
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return tailTrim.get(s);
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.raster.util.ICancellable#isCanceled()
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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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* (non-Javadoc)
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* @see org.gvsig.raster.util.ICancellable#setCanceled(boolean)
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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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} |