gvsig-raster / org.gvsig.raster.principalcomponents / trunk / org.gvsig.raster.principalcomponents / org.gvsig.raster.principalcomponents.algorithm / src / main / java / org / gvsig / raster / principalcomponents / algorithm / PrincipalComponentsProcess.java @ 2100
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package org.gvsig.raster.principalcomponents.algorithm; |
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import java.awt.geom.Point2D; |
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import java.awt.geom.Rectangle2D; |
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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.dataset.BufferParam; |
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import org.gvsig.fmap.dal.coverage.datastruct.Extent; |
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import org.gvsig.fmap.dal.coverage.datastruct.NoData; |
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import org.gvsig.fmap.dal.coverage.exception.BufferCreationException; |
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import org.gvsig.fmap.dal.coverage.exception.CloneException; |
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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.RasterDriverException; |
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import org.gvsig.fmap.dal.coverage.store.RasterDataStore; |
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import org.gvsig.fmap.dal.coverage.store.RasterQuery; |
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import org.gvsig.i18n.Messages; |
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import org.gvsig.raster.algorithm.process.DataProcess; |
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import org.gvsig.raster.algorithm.process.ProcessException; |
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import org.gvsig.raster.fmap.roi.VectorialROI; |
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import Jama.Matrix; |
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/**
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* PCA Process
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class PrincipalComponentsProcess extends DataProcess { |
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public static String RASTER_STORE = "RasterStore"; |
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public static String PATH = "Path"; |
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public static String FILENAME = "FileName"; |
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public static final String BUFFERS = "BUFFERS"; |
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public static final String SELECTEDPCS = "SELECTEDPCS"; |
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public static final String PCSTATISTICS = "PCSTATISTICS"; |
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public static final String DATAROI = "DATAROI"; |
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public static final String EXTENT = "EXTENT"; |
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public static final String GRAPHIC_DATA = "GRAPHIC_DATA"; |
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private RasterDataStore store = null; |
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private String filename = null; |
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private PCStatsDataStructure pcStatistics = null; |
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private VectorialROI[] dataROI = null; |
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private Extent extentResult = null; |
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private boolean[] selectedPCs = null; |
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private int[] selectedBands = null; |
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private NoData nodata = null; |
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public static void registerParameters() { |
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registerInputParameter(RASTER_STORE, RasterDataStore.class, PrincipalComponentsAlgorithmLibrary.PROCESS_LABEL); |
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registerInputParameter(PCSTATISTICS, PCStatsDataStructure.class, PrincipalComponentsAlgorithmLibrary.PROCESS_LABEL); |
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registerInputParameter(PATH, String.class, PrincipalComponentsAlgorithmLibrary.PROCESS_LABEL);
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registerInputParameter(DATAROI, VectorialROI[].class, PrincipalComponentsAlgorithmLibrary.PROCESS_LABEL);
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registerOutputParameter(FILENAME, String.class, PrincipalComponentsAlgorithmLibrary.PROCESS_LABEL);
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registerOutputParameter(GRAPHIC_DATA, Double[].class, PrincipalComponentsAlgorithmLibrary.PROCESS_LABEL); |
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} |
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public void init() { |
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store = getParam(RASTER_STORE) != null ? (RasterDataStore)getParam(RASTER_STORE) : null; |
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filename = getStringParam(PATH); |
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selectedPCs = (boolean[]) getParam(SELECTEDPCS); |
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pcStatistics = (PCStatsDataStructure) getParam(PCSTATISTICS); |
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dataROI = (VectorialROI[]) getParam(DATAROI);
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} |
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/**
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* Gets the bounding box taking into account if there are ROIs or not
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* @return
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*/
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private Extent getExtentResult() {
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if(dataROI == null) |
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return store.getExtent();
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else {
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Extent maxExtent = null;
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for (int i = 0; i < dataROI.length; i++) { |
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if(i == 0) |
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maxExtent = dataROI[i].getExtent(); |
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else
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maxExtent = maxExtent.encloseBoundinBoxes(dataROI[i].getExtent()); |
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} |
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return maxExtent;
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} |
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} |
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/**
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* Gets the bounding box of the source in pixel coordinates
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* @param ext
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* @return
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*/
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private Rectangle2D getSourcePxBox(Extent ext) { |
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if(dataROI == null) |
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return new Rectangle2D.Double(0, 0, store.getWidth(), store.getHeight()); |
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Point2D p1 = store.worldToRaster(new Point2D.Double(ext.getULX(), ext.getULY())); |
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Point2D p2 = store.worldToRaster(new Point2D.Double(ext.getLRX(), ext.getLRY())); |
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return new Rectangle2D.Double(p1.getX(), p1.getY(), Math.abs(p2.getX() - p1.getX()), Math.abs(p2.getY() - p1.getY())); |
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} |
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public void process() throws ProcessInterruptedException, ProcessException { |
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insertLineLog(Messages.getText("..."));
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try {
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if (store == null) |
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throw new PrincipalComponentsException(Messages.getText("need_a_input")); |
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try {
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store = ((RasterDataStore)store).cloneDataStore(); |
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} catch (CloneException e) {
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new PrincipalComponentsException("Error cloning the input DataStore", e); |
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} |
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extentResult = getExtentResult(); |
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Rectangle2D sourcePxBBox = getSourcePxBox(extentResult);
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double cellSize = store.getCellSize();
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nodata = RasterLocator.getManager().getDataStructFactory().createDefaultNoData(1, Buffer.TYPE_DOUBLE); |
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double nodataValue = nodata.getValue().doubleValue();
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int bandCount = getNumberOfSelectedBands(selectedPCs);
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Buffer outputBuffer = createOutputBuffer(sourcePxBBox, bandCount);
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Buffer sourceBuffer = createSourceBuffer(sourcePxBBox, selectedPCs);
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// Matriz Autovectores
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// Colocamos la matriz en el orden correcto:
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/*
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* b3 b2 b1 c1 c2 c3 | | | | Cambio de orden de columnas de la matriz
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* transpuesta ___ \ / V c1 c2 c3 b1 b2 b3
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*/
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Matrix autovect = changeColumns((pcStatistics.getAutoVectorsMatrix().transpose())); |
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insertLineLog(Messages.getText("writting_in_buffer"));
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for (int i = 0; i < sourcePxBBox.getHeight(); i++) { |
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for (int j = 0; j < sourcePxBBox.getWidth(); j++) { |
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if (isInsideOfROI(j, i)) {
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for (int iComponent = 0; iComponent < sourceBuffer.getBandCount(); iComponent++) { |
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if(selectedPCs[iComponent]) {
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double valor = 0; |
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for (int iBand = 0; iBand < sourceBuffer.getBandCount(); iBand++) { |
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valor += getData(sourceBuffer, i, j, iBand) * autovect.get(iBand, iComponent); |
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} |
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int indexBandResult = indexBandResult(selectedPCs, iComponent);
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outputBuffer.setElem(i, j, indexBandResult, (double) valor);
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} |
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} |
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} else {
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for (int iBand = 0; iBand < outputBuffer.getBandCount(); iBand++) { |
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outputBuffer.setElem(i, j, iBand, nodataValue); |
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} |
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} |
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} |
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updatePercent((int)(i * 100 / store.getHeight()), 100); |
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} |
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super.exportRaster(filename,
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outputBuffer, |
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cellSize, |
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extentResult.getULX(), |
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extentResult.getULY()); |
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addOutputValue(FILENAME, filename); |
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addOutputValue(GRAPHIC_DATA, filename); |
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} catch (PrincipalComponentsException e) {
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if (incrementableTask != null) |
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incrementableTask.processFinalize(); |
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messageBoxError("...", null, e); |
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} |
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} |
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/**
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* Checks if the point in pixel coordinates is inside the region of
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* interest or not
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* @param x
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* @param y
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* @return
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*/
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private boolean isInsideOfROI(int x, int y) { |
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if(dataROI == null) |
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return true; |
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for (int i = 0; i < dataROI.length; i++) { |
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if(dataROI[i].isInGrid(x, y))
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return true; |
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} |
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return false; |
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} |
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/**
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* Gets the number of the selected bands
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* @param bandsPCs
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* @return
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*/
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private int getNumberOfSelectedBands(boolean[] bandsPCs) { |
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int bandCount = 0; |
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for (int i = 0; i < bandsPCs.length; i++) { |
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if(bandsPCs[i])
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bandCount++; |
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} |
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return bandCount;
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} |
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/**
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* Gets the band index of the result buffer
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* @param bandsPCs
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* @param indexIn
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* @return
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*/
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private int indexBandResult(boolean[] bandsPCs, int indexIn) { |
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if(selectedBands == null) { |
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selectedBands = new int[bandsPCs.length]; |
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int indexOut = 0; |
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for (int i = 0; i < bandsPCs.length; i++) { |
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if(bandsPCs[i]) {
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selectedBands[i] = indexOut; |
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indexOut++; |
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} else
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selectedBands[i] = -1;
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} |
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} |
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return selectedBands[indexIn];
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} |
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/**
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* Builds the output buffer
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* @param sourcePxBBox
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* @param bandCount
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* @return
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*/
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private Buffer createOutputBuffer(Rectangle2D sourcePxBBox, int bandCount) { |
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RasterManager rManager = RasterLocator.getManager(); |
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BufferParam bParams = rManager.getBufferFactory().createBufferParams( |
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(int)sourcePxBBox.getWidth(),
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(int)sourcePxBBox.getHeight(),
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bandCount, |
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Buffer.TYPE_DOUBLE,
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true);
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Buffer resultBuffer = null; |
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try {
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resultBuffer = rManager.getBufferFactory().createBuffer(bParams); |
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} catch (BufferCreationException e) {
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new ProcessException("Error creating the output buffer", e); |
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} |
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return resultBuffer;
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} |
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/**
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* Gets a buffer of a raster
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*/
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private Buffer createSourceBuffer(Rectangle2D sourcePxBBox, boolean[] bandsPCs) throws PrincipalComponentsException { |
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RasterManager rManager = RasterLocator.getManager(); |
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RasterQuery query = rManager.createQuery(); |
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query.setReadOnly(true);
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query.setAllDrawableBands(); |
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query.setAreaOfInterest( |
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(int)sourcePxBBox.getX(),
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(int)sourcePxBBox.getY(),
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(int)sourcePxBBox.getWidth(),
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(int)sourcePxBBox.getHeight());
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try {
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Buffer buffer = null; |
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try {
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buffer = store.query(query); |
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} catch (RasterDriverException e) {
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new PrincipalComponentsException("Error creating the input buffer", e); |
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} catch (InvalidSetViewException e) {
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new PrincipalComponentsException("Error creating the input buffer", e); |
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} |
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return buffer;
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} catch (ProcessInterruptedException e) {
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logger.error("Error al crear buffer de escritura.");
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} |
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return null; |
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} |
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private double getData(Buffer b, int j, int i, int band) { |
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double val = 0; |
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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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return nodata.getValue().doubleValue();
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} |
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public double getScaleFactor(Buffer buffer, int sizePreview) { |
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double x = 0, y = 0; |
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x = 200.0 / buffer.getWidth();
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y = 200.0 / buffer.getHeight();
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if (x > y) {
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return y;
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} else {
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return x;
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} |
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} |
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private Matrix changeColumns(Matrix m) {
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Matrix result = new Matrix(m.getRowDimension(), m.getColumnDimension());
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int k = m.getColumnDimension() - 1; |
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for (int i = 0; i < m.getRowDimension(); i++) { |
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for (int j = 0; j < m.getColumnDimension(); j++) { |
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result.set(i, j, m.get(k - i, j)); |
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} |
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} |
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return result;
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} |
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public String getTitle() { |
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return Messages.getText("..."); |
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} |
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} |