gvsig-raster / org.gvsig.raster / trunk / org.gvsig.raster / org.gvsig.raster.lib / org.gvsig.raster.lib.impl / src / main / java / org / gvsig / raster / impl / grid / roi / ROIStatistic.java @ 2125
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.raster.impl.grid.roi; |
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import org.gvsig.fmap.dal.coverage.RasterLocator; |
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import org.gvsig.fmap.dal.coverage.RasterManager; |
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import org.gvsig.fmap.dal.coverage.dataset.Buffer; |
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import org.gvsig.fmap.dal.coverage.datastruct.NoData; |
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import org.gvsig.fmap.dal.coverage.exception.GridException; |
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import org.gvsig.fmap.dal.coverage.exception.InvalidSetViewException; |
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import org.gvsig.fmap.dal.coverage.exception.ProcessInterruptedException; |
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import org.gvsig.fmap.dal.coverage.exception.RasterBufferInvalidAccessException; |
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import org.gvsig.fmap.dal.coverage.exception.RasterDriverException; |
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import org.gvsig.fmap.dal.coverage.store.RasterQuery; |
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import org.gvsig.fmap.dal.coverage.store.props.Statistics; |
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import org.gvsig.raster.roi.AbstractROI; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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/**
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* Estad?sticas asociadas a una ROI.
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*
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* Diego Guerrero Sevilla (diego.guerrero@uclm.es)
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*
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*/
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public class ROIStatistic implements Statistics { |
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private static final Logger logger = LoggerFactory.getLogger(ROIStatistic.class); |
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private AbstractROI roi = null; |
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private long[] values = null; |
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private double[] max = null; |
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private double[] min = null; |
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private double[] mean = null; |
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private double[] variance = null; |
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private boolean statisticsCalculated = false; |
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private boolean advancedStatisticsCalculated = false; |
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private Buffer fullBuffer = null; |
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//protected int bandToOperate = 0;
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/**
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* Matriz de varianza covarianza
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*/
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private double [][] varCov = null; |
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public ROIStatistic(AbstractROI roi) {
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this.roi = roi;
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} |
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private Buffer getFullBuffer() { |
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if(fullBuffer == null) { |
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RasterManager rManager = RasterLocator.getManager(); |
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RasterQuery query = rManager.createQuery(); |
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query.setAllDrawableBands(); |
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query.setReadOnly(true);
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try {
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query.setAreaOfInterest(); |
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fullBuffer = roi.getStore().query(query); |
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} catch (RasterDriverException e) {
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logger.debug("Error reading buffer", e);
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} catch (ProcessInterruptedException e) {
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logger.debug("Carga interrumpida", e);
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} catch (InvalidSetViewException e) {
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logger.debug("Error reading buffer", e);
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} |
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} |
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return fullBuffer;
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} |
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/**
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* Calcula las estad?sticas b?sicas (Max, Min, Media, Varianza).
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*
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* @throws RasterBufferInvalidAccessException
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*/
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public void calculate(double scale) throws RasterDriverException { |
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int x, y;
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double z;
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int bandCount = roi.getStore().getBandCount();
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values = new long[bandCount]; |
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mean = new double[bandCount]; |
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min = new double[bandCount]; |
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max = new double[bandCount]; |
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variance = new double[bandCount]; |
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for (int iBand = 0; iBand < bandCount; iBand++) { |
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mean[iBand] = 0.0;
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variance[iBand] = 0.0;
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values[iBand] = 0;
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} |
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//int oldBandToOperate = bandToOperate;
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statisticsCalculated = true;
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for (int iBand = 0; iBand < bandCount; iBand++) { |
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for (y = 0; y < getFullBuffer().getHeight(); y++){ |
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for (x = 0; x < getFullBuffer().getWidth(); x++){ |
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z = getValue(x, y, iBand); |
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if(roi.getStore().getNoDataValue().getValue().doubleValue() != z) {
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if( values[iBand] == 0 ) |
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min[iBand] = max[iBand] = z; |
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else if( min[iBand] > z ) |
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min[iBand] = z; |
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else if( max[iBand] < z ) |
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max[iBand] = z; |
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mean[iBand] += z; |
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variance[iBand] += z * z; |
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values[iBand]++; |
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} |
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} |
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} |
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} |
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for (int iBand = 0; iBand < bandCount; iBand++) { |
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if( values[iBand] > 0 ){ |
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mean[iBand] /= (double) values[iBand];
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variance[iBand] = variance[iBand] / (double) values[iBand] - mean[iBand] * mean[iBand];
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} |
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} |
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//bandToOperate = oldBandToOperate;
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statisticsCalculated = true;
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} |
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/**
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* Calculo de estadisticas avanzadas (Matriz varianza- covarianza).
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*/
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public void calculateAdvanced() throws GridException { |
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if (!isCalculated())
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try {
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calculate(1);
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} catch (RasterDriverException e) {
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throw new GridException("", e); |
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} |
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int bandCount = roi.getBandCount();
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double dSum[][] = new double[bandCount][bandCount]; |
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double iValues[][] = new double[bandCount][bandCount]; |
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varCov = new double[bandCount][bandCount]; |
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double valorBandai = 0, valorBandaj = 0; |
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for (int iBand = 0; iBand < bandCount; iBand++) |
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for (int jBand = 0; jBand < bandCount; jBand++){ |
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dSum[iBand][jBand] = 0;
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iValues[iBand][jBand] = 0;
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} |
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for (int k = 0; k < getFullBuffer().getHeight(); k++) { |
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for (int l = 0; l < getFullBuffer().getWidth(); l++) { |
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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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valorBandai = getValue(l, k, i); |
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valorBandaj = getValue(l, k, j); |
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if (roi.getStore().getNoDataValue().getValue().doubleValue() != valorBandai &&
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roi.getStore().getNoDataValue().getValue().doubleValue() != valorBandaj) {
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valorBandai = valorBandai - mean[i]; |
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valorBandaj = valorBandaj - mean[j]; |
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dSum[i][j] += valorBandai*valorBandaj; |
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iValues[i][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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// Asigno el valor a la matriz
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for (int iBand = 0; iBand < bandCount; iBand++) |
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for (int jBand = 0; jBand < bandCount; jBand++) |
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if (iValues[iBand][jBand] > 1) |
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varCov[iBand][jBand] = dSum[iBand][jBand] / (double)(iValues[iBand][jBand]);
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else
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varCov[iBand][jBand] = roi.getStore().getNoDataValue().getValue().doubleValue(); |
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// Completar parte simetrica de la matriz
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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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varCov[i][j] = varCov[j][i]; |
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} |
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} |
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advancedStatisticsCalculated = true;
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} |
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private double getValue(int j, int i, int band) { |
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double val = 0; |
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Buffer b = getFullBuffer();
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if(b.getDataType() == Buffer.TYPE_BYTE) { |
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val = (double)b.getElemByte(j, i, band);
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return val;
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} |
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if(b.getDataType() == Buffer.TYPE_DOUBLE) { |
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val = (double)b.getElemDouble(j, i, band);
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return val;
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} |
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if(b.getDataType() == Buffer.TYPE_FLOAT) { |
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val = (double)b.getElemFloat(j, i, band);
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return val;
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} |
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if(b.getDataType() == Buffer.TYPE_INT) { |
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val = (double)b.getElemInt(j, i, band);
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return val;
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} |
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if(b.getDataType() == Buffer.TYPE_SHORT) { |
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val = (double)b.getElemShort(j, i, band);
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return val;
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} |
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NoData nd = RasterLocator.getManager().getDataStructFactory().createDefaultNoData(1, Buffer.TYPE_DOUBLE); |
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return nd.getValue().doubleValue();
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Statistics#getMaximun()
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*/
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public double getMaximun() { |
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double m = Double.NEGATIVE_INFINITY; |
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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.dal.coverage.store.props.Statistics#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.dal.coverage.store.props.Statistics#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.dal.coverage.store.props.Statistics#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.dal.coverage.store.props.Statistics#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.dal.coverage.store.props.Statistics#isCalculated()
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*/
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public boolean isCalculated() { |
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return statisticsCalculated;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Statistics#setCalculated(boolean)
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*/
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public void setCalculated(boolean calc) { |
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statisticsCalculated = calc; |
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advancedStatisticsCalculated = calc; |
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} |
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/**
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* Obtiene la varianza
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* @return Varianza
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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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* Devuelve la matriz de varianza-covarianza, si no se encuentra calculada se calcula
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* @retrun Matriz de varianza-covarianza
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*/
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public double[][] getVarianceCovarianceMatrix() { |
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return varCov;
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} |
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public boolean isAdvancedStatisticsCalculated() { |
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return advancedStatisticsCalculated;
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} |
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public void setAdvancedStatisticCalculated( |
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boolean advancedStatisticCalculated) {
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this.advancedStatisticsCalculated = advancedStatisticCalculated;
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} |
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/**
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*
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* @return n?mero de celdas del ROI.
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*/
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public long[] getNumberOfCells() { |
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return values;
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} |
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public void forceToRecalc() { |
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} |
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public int getBandCount() { |
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return 0; |
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} |
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public void setBandCount(int bandCount) { |
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} |
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public double[] getMaxByteUnsigned() { |
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return null; |
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} |
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public double getMaximunByteUnsigned() { |
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return 0; |
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} |
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public double[] getMinByteUnsigned() { |
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return null; |
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} |
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public double getMinimunByteUnsigned() { |
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return 0; |
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} |
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public int getPercent() { |
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return 0; |
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} |
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public double[] getSecondMax() { |
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return null; |
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} |
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public double[] getSecondMaxByteUnsigned() { |
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return null; |
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} |
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public double[] getSecondMin() { |
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return null; |
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} |
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public double[] getSecondMinByteUnsigned() { |
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return null; |
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} |
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public int getTailTrimCount() { |
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return 0; |
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} |
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public Object getTailTrimValue(double percent) { |
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return null; |
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} |
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public void setTailTrimValue(double percent, Object valueByBand) { |
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} |
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public Object[] getTailTrimValue(int pos) { |
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return null; |
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} |
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public void resetPercent() { |
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} |
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public Statistics cloneStatistics() {
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return null; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Statistics#getNumberOfValues()
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*/
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public long[] getNumberOfValues() { |
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return values;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.fmap.dal.coverage.store.props.Statistics#setNumberOfValues(long[])
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*/
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public void setNumberOfValues(long[] values) { |
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this.values = values;
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} |
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} |