svn-gvsig-desktop / trunk / extensions / extGeoreferencing / src / org / gvsig / georeferencing / GeoOperations.java @ 5352
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package org.gvsig.georeferencing; |
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import java.awt.geom.Point2D; |
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import java.io.BufferedOutputStream; |
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import java.io.BufferedReader; |
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import java.io.BufferedWriter; |
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import java.io.DataOutputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import java.io.InputStreamReader; |
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import java.io.OutputStream; |
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import java.io.OutputStreamWriter; |
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import java.util.zip.DataFormatException; |
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import org.cresques.io.RasterMetaFileTags; |
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import org.gvsig.georeferencing.utils.AffineT; |
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import org.gvsig.georeferencing.utils.MathUtils; |
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import org.gvsig.georeferencing.utils.PointT; |
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import org.xmlpull.v1.XmlPullParserException; |
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import org.xmlpull.v1.XmlPullParserFactory; |
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import org.xmlpull.v1.XmlSerializer; |
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import com.iver.cit.gvsig.fmap.layers.FLyrPoints; |
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/**
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* Operaciones necesarias para la georreferenciaci?n a partir de la capa de puntos.
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* En base a unos puntos de control de origen y otros de destino se crea una matriz
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* de transformaci?n para asignar la nueva posici?n a la imagen y crear ficheros
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* de georreferenciaci?n en dos formatos: worldfile y rasterMetaFile
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*
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* @author Nacho Brodin (brodin_ign@gva.es)
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*/
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public class GeoOperations{ |
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//**********************Vars**********************************
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private int order = 1; |
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private PointT[] src = null; |
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private PointT[] dst = null; |
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private AffineT affine = null; |
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private boolean createWorldFile = false; |
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//**********************End Vars******************************
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//**********************Methods*******************************
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/**
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* Constructor
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*/
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public GeoOperations(){}
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/**
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* Constructor. Crea las estructuras de puntos y calcula la transformaci?n af?n.
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* @param lyr
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*/
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public GeoOperations(FLyrPoints lyr){
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FLyrPoints lyrPoints = lyr; |
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src = new PointT[lyr.getCountPoints()];
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dst = new PointT[lyr.getCountPoints()];
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int nPoint = 0; |
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for(int i = 0; i<lyr.getCountPoints(); i++){ |
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if(lyr.getPoint(i).active == true){ |
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src[nPoint] = new PointT();
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dst[nPoint] = new PointT();
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src[nPoint].setX(lyr.getPoint(i).pixelPoint.getX()); |
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src[nPoint].setY(lyr.getPoint(i).pixelPoint.getY()); |
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src[nPoint].setI(lyr.getCountPoints()); |
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dst[nPoint].setX(lyr.getPoint(i).mapPoint.getX()); |
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dst[nPoint].setY(lyr.getPoint(i).mapPoint.getY()); |
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dst[nPoint].setI(lyr.getCountPoints()); |
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nPoint++; |
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} |
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} |
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if(lyr.getCountPoints() >= 3 * 10) |
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order = 3;
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else if(lyr.getCountPoints() >= 3 * 6) |
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order = 2;
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else
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order = 1;
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affine = new AffineT();
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//Calcular la transformaci?n afin por m?nimos cuadrados
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affine = computeLeastSquaresAffine(affine, src, dst, order); |
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} |
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/**
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* A partir de la transformaci?n af?n creada en el construtor
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* genera un fichero de georreferenciaci?n para la imagen.
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* @param lyr Capa de puntos
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* @param order Orden del sistema de ecuaciones
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* @param widthPx Ancho en pixeles de la imagen a georreferenciar
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* @param heightPx Alto en pixeles de la imagen a georreferenciar
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* @param file Nombre del fichero raster a georreferenciar
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*/
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public void createGeorefFile(int widthPx, int heightPx, String file){ |
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try{
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File f = new File(file); |
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String nameWorldFile = f.getPath().substring(0, f.getPath().lastIndexOf(".")) + getExtensionWorldFile(file); |
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if(createWorldFile)
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createWorldFile(affine, widthPx, heightPx, nameWorldFile); |
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createRasterMetaFile(affine, widthPx, heightPx, nameWorldFile.substring(0, nameWorldFile.lastIndexOf("."))+".rmf"); |
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}catch(IOException ex){ |
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System.err.println("Can't create WorldFile"); |
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} |
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} |
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/**
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* A partir de la transformaci?n af?n calculada en el contructor
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* transforma los puntos pasados como par?metros.
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* @param lyr Capa de puntos
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* @param list Lista de puntos a transformar
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* @return Lista de puntos transformados
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*/
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public Point2D[] transformPoints(Point2D[] list){ |
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Point2D[] result = new Point2D[list.length]; |
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for(int i = 0; i < list.length;i++){ |
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double[] pto = transformPoint((int)list[i].getX(), (int)list[i].getY(), affine); |
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result[i] = new Point2D.Double(pto[0], pto[1]); |
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} |
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return result;
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} |
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/**
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* Crea un fichero de georreferenciaci?n (worldfile) a partir de la transformaci?n af?n. Para
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* esto necesita obtener las coordenadas reales de la coordenada en pixels (0,0) y calcular
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* el tama?o de pixel.
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* @param affine Transformaci?n
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* @param widthPx Ancho en pixeles de la imagen a georreferenciar
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* @param heightPx Alto en pixeles de la imagen a georreferenciar
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* @param nameWordlFile Nombre del fichero de georreferenciaci?n
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* @throws IOException
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*/
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private void createWorldFile(AffineT affine, int widthPx, int heightPx, String nameWordlFile) throws IOException { |
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StringBuffer data = new StringBuffer(); |
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double[] begin = transformPoint(0, 0, affine); |
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double[] end = transformPoint(widthPx, heightPx, affine); |
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File f = new File(nameWordlFile); |
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DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(f)) ); |
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double pixelSizeX = (end[0] - begin[0])/(widthPx - 1); |
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double pixelSizeY = (end[1] - begin[1])/(heightPx - 1); |
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data.append(pixelSizeX+"\n");
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data.append("0.0\n");
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data.append("0.0\n");
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data.append((-1 * pixelSizeY)+"\n"); |
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data.append(""+begin[0]+"\n"); |
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data.append(""+end[1]+"\n"); |
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dos.writeBytes(data.toString()); |
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dos.close(); |
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} |
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/**
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* A partir de XmlSerializer se salva la georreferenciaci?n
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* @param serializer
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* @param min
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* @param max
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* @param widthPx Ancho en pixeles de la imagen a georreferenciar
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* @param heightPx Alto en pixeles de la imagen a georreferenciar
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* @throws IOException
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*/
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private void serializeGeoreferencing(XmlSerializer serializer, double[] min, double[] max, int widthPx, int heightPx) throws IOException { |
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double pixelSizeX = (max[0] - min[0])/(widthPx - 1); |
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double pixelSizeY = (max[1] - min[1])/(heightPx - 1); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PROJ).text("Projection").endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PROJ).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.BBOX).text("\n");
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.POSX).text(""+min[0]).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.POSX).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.POSY).text(""+max[1]).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.POSY).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_SIZE_X).text(""+pixelSizeX).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_SIZE_X).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_SIZE_Y).text(""+ (-1 * pixelSizeY)).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_SIZE_Y).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.WIDTH).text(""+(max[0] - min[0])).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.WIDTH).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.HEIGHT).text(""+(max[1] - min[1])).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.HEIGHT).text("\n"); |
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serializer.endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.BBOX).text("\n");
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.DIM).text("\n");
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_WIDTH).text(""+widthPx).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_WIDTH).text("\n"); |
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_HEIGHT).text(""+heightPx).endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.PX_HEIGHT).text("\n"); |
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serializer.endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.DIM).text("\n");
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} |
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/**
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* Si ya existe un fichero de georreferenciaci?n se ha creado un fichero .tmp con
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* la nueva georreferenciaci?n. Esta funci?n mezcla este temporal con el .rmf existente
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* en un nuevo fichero _tmpOutput que ser? renombrado como el nuevo .rmf. Finalmente
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* elimina el temporal y el _tmpOutput.
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* @param fileName
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*/
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private void mergeFiles(String fileName){ |
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try{
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File rmfFile = new File(fileName); |
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File tmpFile = new File(fileName.substring(0, fileName.lastIndexOf("."))+".tmp"); |
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File out = new File(rmfFile+"_tmpOutput"); |
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BufferedReader inRmf = new BufferedReader(new InputStreamReader(new FileInputStream(rmfFile))); |
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BufferedReader inTmp = new BufferedReader(new InputStreamReader(new FileInputStream(tmpFile))); |
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BufferedWriter outTmp = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(out))); |
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//Leemos el principio del .rmf
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String str = inRmf.readLine();
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while(!str.startsWith("<"+RasterMetaFileTags.MAIN_TAG)){ |
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outTmp.write(str+"\n");
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str = inRmf.readLine(); |
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} |
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outTmp.write(str+"\n");
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//Leemos la georreferenciaci?n del .tmp
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while(str != null && !str.startsWith("<"+RasterMetaFileTags.LAYER)) |
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str = inTmp.readLine(); |
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while(str != null){ |
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outTmp.write(str+"\n");
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str = inTmp.readLine(); |
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} |
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//Saltamos la georreferenciaci?n que ya existia en el .rmf
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try{
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str = inRmf.readLine(); |
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while(str != null && |
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!str.startsWith("</"+RasterMetaFileTags.LAYER) &&
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!str.startsWith("<"+RasterMetaFileTags.GEOPOINTS) &&
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!str.startsWith("</"+RasterMetaFileTags.MAIN_TAG))
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str = inRmf.readLine(); |
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}catch(Exception exc){ |
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} |
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//Leemos el resto del fichero .rmf
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if(!str.startsWith("<"+RasterMetaFileTags.GEOPOINTS)) |
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str = inRmf.readLine(); |
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while(str != null){ |
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outTmp.write(str+"\n");
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str = inRmf.readLine(); |
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} |
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outTmp.close(); |
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inRmf.close(); |
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inTmp.close(); |
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//Eliminamos el antiguo .rmf y lo sustituimos
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rmfFile.delete(); |
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out.renameTo(rmfFile); |
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tmpFile.delete(); |
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}catch(FileNotFoundException exc){ |
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}catch(IOException exc){ |
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} |
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} |
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/**
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* Si no existe crea un fichero .rmf con la georreferenciaci?n de la imagen. Si existe este
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* deber? a?adir o modificar la informaci?n de georreferenciaci?n en el fichero.
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* Para esto necesita obtener las coordenadas reales de la coordenada en pixels (0,0) y
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* calcular el tama?o de pixel.
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* @param affine Transformaci?n
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* @param widthPx Ancho en pixeles de la imagen a georreferenciar
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* @param heightPx Alto en pixeles de la imagen a georreferenciar
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* @param nameWordlFile Nombre del fichero de georreferenciaci?n
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* @throws IOException
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*/
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private void createRasterMetaFile(AffineT affine, int widthPx, int heightPx, String nameWorldFile) throws IOException { |
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File file = new File(nameWorldFile); |
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double[] min = transformPoint(0, 0, affine); |
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double[] max = transformPoint(widthPx, heightPx, affine); |
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try{
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XmlPullParserFactory factory = XmlPullParserFactory.newInstance(System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null); |
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XmlSerializer serializer = factory.newSerializer(); |
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if(file.exists()){
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file = new File(nameWorldFile.substring(0, nameWorldFile.lastIndexOf("."))+".tmp"); |
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serializer.setOutput(new FileOutputStream(file), null); |
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serializer.startDocument(null, null); |
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serializer.ignorableWhitespace("\n\n");
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serializer.setPrefix("", RasterMetaFileTags.NAMESPACE);
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.LAYER).text("\n");
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serializeGeoreferencing(serializer, min, max, widthPx, heightPx); |
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serializer.endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.LAYER).text("\n");
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serializer.endDocument(); |
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mergeFiles(nameWorldFile); |
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}else{
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serializer.setOutput(new FileOutputStream(file), null); |
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serializer.startDocument(null, null); |
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serializer.ignorableWhitespace("\n\n");
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serializer.setPrefix("", RasterMetaFileTags.NAMESPACE);
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.MAIN_TAG).text("\n");
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serializer.startTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.LAYER).text("\n");
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serializeGeoreferencing(serializer, min, max, widthPx, heightPx); |
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serializer.endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.LAYER).text("\n");
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serializer.endTag(RasterMetaFileTags.NAMESPACE, RasterMetaFileTags.MAIN_TAG).text("\n");
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serializer.endDocument(); |
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} |
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}catch(XmlPullParserException exc){}
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} |
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/**
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* Calcula la transformaci?n af?n a partir de los puntos introducidos por el m?todo de
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* m?nimos cuadrados.
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* @param af Transformaci?n af?n
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* @param src Puntos de entrada en coordenadas pixel
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* @param dst Puntos de destino en coordenadas del mundo
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* @param order Orden del sistema de ecuaciones
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*/
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public AffineT computeLeastSquaresAffine(AffineT af, PointT[] src, PointT[] dst, int order){ |
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double[] b = new double[dst.length]; |
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int i,cofs;
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af.setOrder(order); |
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cofs = order <= 2 ? order*3 : 10; |
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af.mallocCofs(cofs); |
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//First compute the X cofs
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for(i = 0; i < dst.length; i++) { |
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b[i] = dst[i].getX(); |
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} |
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af.setCofX(singleLeastSquaresAffine(af.getXcofs(), src, b, order)); |
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//Now compute the Y cofs
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for(i = 0; i < dst.length; i++) { |
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b[i] = dst[i].getY(); |
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} |
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af.setCofY(singleLeastSquaresAffine(af.getYcofs(), src, b, order)); |
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return af;
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} |
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private double[] singleLeastSquaresAffine(double[] a, PointT[] src, double[] dst, int order){ |
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int i,j;
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int n = dst.length;
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int points = order <= 2 ? order * 3 : 10; |
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double[][] combined = new double[points][points + 1]; |
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double[][] A = new double[n + 1][points]; |
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double[][] b = new double[n + 1][1]; |
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for(i = 0; i < n; i++) { |
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A[i][0] = 1.0; |
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A[i][1] = src[i].getX();
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A[i][2] = src[i].getY();
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if(order > 1) { |
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A[i][3] = src[i].getX() * src[i].getX();
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A[i][4] = src[i].getX() * src[i].getY();
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A[i][5] = src[i].getY() * src[i].getY();
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} |
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if(order > 2) { |
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A[i][6] = src[i].getX() * src[i].getX() * src[i].getX();
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A[i][7] = src[i].getX() * src[i].getX() * src[i].getY();
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A[i][8] = src[i].getX() * src[i].getY() * src[i].getY();
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A[i][9] = src[i].getY() * src[i].getY() * src[i].getY();
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} |
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b[i][0] = dst[i];
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} |
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double[][] Atrans = MathUtils.transpose(A, n, points); |
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double[][] left = MathUtils.multmatrix(Atrans,A,points,n,points); |
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double[][] right = MathUtils.multmatrix(Atrans,b,points,n,1); |
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for(i = 0; i < points; i++) { |
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combined[i][0] = right[i][0]; |
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for(j = 0; j < points; j++) { |
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combined[i][j+1] = left[i][j];
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} |
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} |
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try{
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combined = solve(combined, points, points+1);
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}catch(DataFormatException ex){ |
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System.err.println("Can't solve matrix"); |
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} |
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for(i = 0; i < points; i++) { |
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a[i] = combined[i][0];
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} |
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return a;
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} |
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private double[][] solve(double[][] mat,int rows,int cols)throws DataFormatException{ |
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int i,j,k;
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double d,tmp;
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int big;
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for(i = 0; i < rows; i++) { |
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// Find largest row
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big = i; |
| 391 |
for(j = i; j < rows; j++) {
|
| 392 |
if(Math.abs(mat[j][i+1]) > Math.abs(mat[big][i+1])) { |
| 393 |
big = j; |
| 394 |
} |
| 395 |
} |
| 396 |
// swap row i and row big
|
| 397 |
for(k = 0; k < cols ; k++) { |
| 398 |
tmp = mat[i][k]; |
| 399 |
mat[i][k] = mat[big][k]; |
| 400 |
mat[big][k] = tmp; |
| 401 |
} |
| 402 |
if(mat[i][i+1] == 0) |
| 403 |
throw new DataFormatException(); |
| 404 |
|
| 405 |
d = 1.0 / mat[i][i+1]; |
| 406 |
for(j = 0; j < cols ; j++) { |
| 407 |
mat[i][j] *= d; |
| 408 |
//assert(!isnan(mat[i][j]));
|
| 409 |
} |
| 410 |
for(k = 0; k < rows; k++) { |
| 411 |
if(k == i)
|
| 412 |
continue;
|
| 413 |
if(mat[k][i+1] != 0.0) { |
| 414 |
d = mat[k][i+1] / mat[i][i+1]; |
| 415 |
for(j = 0; j < cols ; j++) { |
| 416 |
mat[k][j] -= d*mat[i][j]; |
| 417 |
//assert(!isnan(mat[k][j]));
|
| 418 |
} |
| 419 |
} |
| 420 |
} |
| 421 |
} |
| 422 |
return mat;
|
| 423 |
} |
| 424 |
|
| 425 |
/**
|
| 426 |
* Obtiene las coordenadas de un punto en coordenadas del mundo a partir de una transformaci?n
|
| 427 |
* y el punto de entrada en coordenadas de la imagen.
|
| 428 |
* @param sx Coordenada X del punto de entrada
|
| 429 |
* @param syz Coordenada Y del punto de entrada
|
| 430 |
* @param af Transformaci?n
|
| 431 |
* @return Punto transformado
|
| 432 |
*/
|
| 433 |
public double[] transformPoint(int sx, int sy, AffineT af){ |
| 434 |
double[] p = new double[2]; |
| 435 |
if(af.getOrder() == 1) { |
| 436 |
p[0] = af.getCofX(0) + af.getCofX(1) * sx + af.getCofX(2) * sy; |
| 437 |
p[1] = af.getCofY(0) + af.getCofY(1) * sx + af.getCofY(2) * sy; |
| 438 |
} |
| 439 |
else if(af.getOrder() == 2) { |
| 440 |
p = quadTransformPoint(sx, sy, af); |
| 441 |
} |
| 442 |
else {
|
| 443 |
p = cubicTransformPoint(sx, sy, af); |
| 444 |
} |
| 445 |
return p;
|
| 446 |
} |
| 447 |
|
| 448 |
private static double[] quadTransformPoint(int sx, int sy, AffineT af){ |
| 449 |
double[] p = new double[2]; |
| 450 |
p[0] = af.getCofX(0) + af.getCofX(1) * sx + af.getCofX(2) * sy + |
| 451 |
af.getCofX(3) * sx * sx + af.getCofX(4) * sx * sy + af.getCofX(5) * sy * sy; |
| 452 |
p[1] = af.getCofY(0) + af.getCofY(1) * sx + af.getCofY(2) * sy + |
| 453 |
af.getCofY(3) * sx * sx + af.getCofY(4) * sx * sy + af.getCofY(5) * sy * sy; |
| 454 |
return p;
|
| 455 |
} |
| 456 |
|
| 457 |
private static double[] cubicTransformPoint(int sx, int sy, AffineT af){ |
| 458 |
double[] p = new double[2]; |
| 459 |
p[0] = af.getCofX(0) + af.getCofX(1) * sx + af.getCofX(2) * sy + |
| 460 |
af.getCofX(3) * sx * sx + af.getCofX(4) * sx * sy + af.getCofX(5) * sy * sy + |
| 461 |
af.getCofX(6) * sx * sx * sx + af.getCofX(7) * sx * sx * sy + |
| 462 |
af.getCofX(8)*sx*sy*sy + af.getCofX(9)*sy*sy*sy; |
| 463 |
p[1] = af.getCofY(0) + af.getCofY(1) * sx + af.getCofY(2) * sy + |
| 464 |
af.getCofY(3) * sx * sx + af.getCofY(4) * sx * sy + af.getCofY(5) * sy * sy + |
| 465 |
af.getCofY(6) * sx * sx * sx + af.getCofY(7) * sx * sx * sy + |
| 466 |
af.getCofY(8) * sx * sy * sy + af.getCofY(9) * sy * sy * sy; |
| 467 |
return p;
|
| 468 |
} |
| 469 |
//**********************End Methods***************************
|
| 470 |
|
| 471 |
//**********************Setters & Getters*********************
|
| 472 |
/**
|
| 473 |
* M?todo para notificar si se desea crear o no el fichero de coordenadas .tfw, .wld .jpgw ,...
|
| 474 |
* @param createWorldFile
|
| 475 |
*/
|
| 476 |
public void setCreateWorldFile(boolean createWorldFile) { |
| 477 |
this.createWorldFile = createWorldFile;
|
| 478 |
} |
| 479 |
|
| 480 |
/**
|
| 481 |
* Obtiene la extensi?n del fichero de georreferenciaci?n
|
| 482 |
* @return String con la extensi?n del fichero de georreferenciaci?n dependiendo
|
| 483 |
* del valor del formato obtenido del servidor. Por defecto asignaremos un .wld
|
| 484 |
*/
|
| 485 |
private String getExtensionWorldFile(String file){ |
| 486 |
String ext = file.substring(file.lastIndexOf(".") + 1); |
| 487 |
String extWorldFile = ".wld"; |
| 488 |
if(ext.equals("tif") || ext.equals("tiff")) |
| 489 |
extWorldFile = ".tfw";
|
| 490 |
if(ext.equals("jpeg") || ext.equals("jpg")) |
| 491 |
extWorldFile = ".jpgw";
|
| 492 |
return extWorldFile;
|
| 493 |
} |
| 494 |
//**********************End Setters & Getters*****************
|
| 495 |
} |