root / trunk / libraries / libCq_CMS_praster / src / org / cresques / filter / segmentation / FirstDerivativeShortFilter.java @ 8026
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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) 2004 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.cresques.filter.segmentation; |
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import org.cresques.filter.RasterFilter; |
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import org.cresques.io.data.RasterBuf; |
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/**
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* Filtro de Sobel que se aplica a un RasterBuf de tipo Short.
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* Toma como entrada la imagen y el umbral (cero para no umbralizar).
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*
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* @author Diego Guerrero Sevilla <diego.guerrero@uclm.es>
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*
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*/
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public class FirstDerivativeShortFilter extends FirstDerivativeFilter { |
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/**
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* Constructor sin par?metros. Este es usado principalmente desde controlTypes
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* ya que se instancia con newInstance y sin par?metros. Poseriormente le aplica
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* el nombre al filtro con la funci?n setFilterName de RasterFilter.
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*/
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public FirstDerivativeShortFilter() {}
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/**
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* Constructor para la asignaci?n del identificador del filtro
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* @param fName Cadena que representa el identificador del filtro
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*/
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public FirstDerivativeShortFilter(String fName) { |
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super(fName);
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} |
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public void process(int col, int line) { |
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short[] pxOut = new short[4]; |
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short[] px = new short[4]; |
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short convoResult[][] = new short[3][4]; |
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int ladoVentana = 3; |
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int semiLado = (ladoVentana-1)>>1; |
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double ventanaR[][]=new double[ladoVentana][ladoVentana]; |
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double ventanaG[][]=new double[ladoVentana][ladoVentana]; |
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double ventanaB[][]=new double[ladoVentana][ladoVentana]; |
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Kernel kernelRGB[]=new Kernel[3]; |
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raster.getElemShort(line, col, px); |
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if((col-semiLado >= 0) && (line-semiLado >= 0) &&(col+semiLado < width)&&(line+semiLado < height)) |
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{
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// Obtener el vector con la ventanas de muestras (una por componente RGB)
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for (int i=-semiLado;i<=semiLado;i++) |
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for(int j=-semiLado;j<=semiLado;j++) |
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{
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raster.getElemShort(line+j, col+i,px); |
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ventanaR[i+semiLado][j+semiLado] =px[0];
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ventanaG[i+semiLado][j+semiLado] =px[1];
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ventanaB[i+semiLado][j+semiLado] =px[2];
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} |
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kernelRGB[0]=new Kernel(ventanaR); |
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kernelRGB[1]=new Kernel(ventanaG); |
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kernelRGB[2]=new Kernel(ventanaB); |
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convoResult[0][0]=(short)operatorH.convolution(kernelRGB[0]); |
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convoResult[0][1]=(short)operatorV.convolution(kernelRGB[0]); |
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convoResult[1][0]=(short)operatorH.convolution(kernelRGB[1]); |
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convoResult[1][1]=(short)operatorV.convolution(kernelRGB[1]); |
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convoResult[2][0]=(short)operatorH.convolution(kernelRGB[2]); |
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convoResult[2][1]=(short)operatorV.convolution(kernelRGB[2]); |
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if (compare){
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if (convoResult[0][0]>convoResult[0][1]) pxOut[0]= convoResult[0][0]; |
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else pxOut[0]= convoResult[0][1]; |
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if (convoResult[1][0]>convoResult[1][1]) pxOut[1]= convoResult[1][0]; |
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else pxOut[1]= convoResult[1][1]; |
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if (convoResult[2][0]>convoResult[2][1]) pxOut[2]= convoResult[2][0]; |
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else pxOut[2]= convoResult[2][1]; |
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} |
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else{
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pxOut[0]=(short)Math.sqrt(Math.pow(convoResult[0][0],2)+Math.pow(convoResult[0][1],2)); |
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pxOut[1]=(short)Math.sqrt(Math.pow(convoResult[1][0],2)+Math.pow(convoResult[1][1],2)); |
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pxOut[2]=(short)Math.sqrt(Math.pow(convoResult[2][0],2)+Math.pow(convoResult[2][1],2)); |
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} |
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if (umbral>0){ |
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if(pxOut[0]>=umbral)pxOut[0]=255; |
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else pxOut[0]=0; |
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if(pxOut[1]>=umbral)pxOut[1]=255; |
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else pxOut[1]=0; |
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if(pxOut[2]>=umbral)pxOut[2]=255; |
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else pxOut[2]=0; |
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} |
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else{
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if (pxOut[0]<0) pxOut[0]=0; |
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else if (pxOut[0]>255) pxOut[0]=255; |
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if (pxOut[1]<0) pxOut[1]=0; |
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else if (pxOut[1]>255) pxOut[1]=255; |
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if (pxOut[2]<0) pxOut[2]=0; |
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else if (pxOut[2]>255) pxOut[2]=255; |
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} |
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rasterResult.setElemShort(line, col,pxOut); |
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} |
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else rasterResult.setElemShort(line, col,pxOut);
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} |
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public void processSuperSampling(int col, int line) { |
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short[] px = new short[4]; |
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short[] pxOut = new short[4]; |
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short convoResult[][] = new short[3][4]; |
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int ladoVentana = 3; |
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RasterFilter.Kernel kernelRGB[];
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raster.getElemShort(line, col,px); |
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// Obtener el vector con la ventanas de muestras (una por componente RGB)
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kernelRGB=extractSubRaster(ladoVentana,col,line); |
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if(kernelRGB!=null) |
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{
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convoResult[0][0]=(short)operatorH.convolution(kernelRGB[0]); |
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convoResult[0][1]=(short)operatorV.convolution(kernelRGB[0]); |
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convoResult[1][0]=(short)operatorH.convolution(kernelRGB[1]); |
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convoResult[1][1]=(short)operatorV.convolution(kernelRGB[1]); |
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convoResult[2][0]=(short)operatorH.convolution(kernelRGB[2]); |
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convoResult[2][1]=(short)operatorV.convolution(kernelRGB[2]); |
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if (compare){
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if (convoResult[0][0]>convoResult[0][1]) pxOut[0]= convoResult[0][0]; |
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else pxOut[0]= convoResult[0][1]; |
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if (convoResult[1][0]>convoResult[1][1]) pxOut[1]= convoResult[1][0]; |
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else pxOut[1]= convoResult[1][1]; |
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if (convoResult[2][0]>convoResult[2][1]) pxOut[2]= convoResult[2][0]; |
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else pxOut[2]= convoResult[2][1]; |
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} |
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else{
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pxOut[0]=(short)Math.sqrt(Math.pow(convoResult[0][0],2)+Math.pow(convoResult[0][1],2)); |
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pxOut[1]=(short)Math.sqrt(Math.pow(convoResult[1][0],2)+Math.pow(convoResult[1][1],2)); |
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pxOut[2]=(short)Math.sqrt(Math.pow(convoResult[2][0],2)+Math.pow(convoResult[2][1],2)); |
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} |
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if (umbral>0){ |
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if(pxOut[0]>=umbral)pxOut[0]=255; |
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else pxOut[0]=0; |
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if(pxOut[1]>=umbral)pxOut[1]=255; |
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else pxOut[1]=0; |
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if(pxOut[2]>=umbral)pxOut[2]=255; |
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else pxOut[2]=0; |
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} |
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else{
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if (pxOut[0]<0) pxOut[0]=0; |
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else if (pxOut[0]>255) pxOut[0]=255; |
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if (pxOut[1]<0) pxOut[1]=0; |
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else if (pxOut[1]>255) pxOut[1]=255; |
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if (pxOut[2]<0) pxOut[2]=0; |
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else if (pxOut[2]>255) pxOut[2]=255; |
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} |
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for(int i = col; i < width && i < (col + stepX[contX + 1]); i++) |
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for(int j = line; j < height && j < (line + stepY[contY + 1]); j++) |
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rasterResult.setElemShort(j, i,pxOut); |
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} |
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else
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for(int i = col; i < rasterResult.getWidth() && i < (col + stepX[contX + 1]); i++) |
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for(int j = line; j < rasterResult.getHeight() && j < (line + stepY[contY + 1]); j++) |
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rasterResult.setElemShort(j, i,px); |
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} |
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public void processLine(int y) { |
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// TODO Auto-generated method stub
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} |
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public int getInRasterDataType() { |
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return RasterBuf.TYPE_SHORT;
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} |
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public int getOutRasterDataType() { |
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return RasterBuf.TYPE_SHORT;
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} |
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public Object getResult(String name) { |
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if (name.equals("raster")) { |
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return (Object) this.rasterResult; |
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} else {
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return null; |
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} |
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} |
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public void pre() { |
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exec = true;
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this.raster = (RasterBuf)params.get("raster"); |
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height = raster.getHeight(); |
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width = raster.getWidth(); |
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rasterResult = new RasterBuf(raster.getDataType(),width,height,raster.getBandCount(),true); |
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super.pre();
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} |
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/**
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* @param ladoVentana Lado del subraster a extraer
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* @param x Coordenada x del pixel central
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* @param y Coordenada y del pixel central
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* @return
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*/
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public Kernel[] extractSubRaster(int ladoVentana,int x,int y){ |
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int k,indiceX,indiceY,origenX,origenY;
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short[] px = new short[4]; |
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int semiLado = (ladoVentana-1)>>1; |
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int offsetX=0; |
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int offsetY=0; |
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Kernel kernelRGB[] = null; |
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// Obtener el vector con las ventanas de muestras (una por componente RGB) **************************
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// Me situo en la esquina superior izquierda del "kernel"
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if ((contX+1-semiLado>=0) && (contY+1-semiLado>=0)&& (contX+1+semiLado<stepX.length) && (contY+1+semiLado<stepY.length)){ |
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// Calcular el alcance del kernel cuyo centro es (x,y)
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for (int i=0;i<semiLado;i++){ |
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offsetX=offsetX+stepX[contX+i+1];
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offsetY=offsetY+stepY[contY+i+1];
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} |
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if((x+offsetX<width)&&(y+offsetY<height)){
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double ventanaR[][] = new double[ladoVentana][ladoVentana]; |
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double ventanaG[][] = new double[ladoVentana][ladoVentana]; |
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double ventanaB[][] = new double[ladoVentana][ladoVentana]; |
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kernelRGB = new Kernel[3]; |
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origenX=x; |
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origenY=y; |
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for (int i=0;i<semiLado;i++){ |
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origenX=origenX-stepX[contX-i]; |
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origenY=origenY-stepY[contY-i]; |
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} |
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//Recorro el kernel seg?n los step
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k=0;
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indiceX=origenX; |
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for (int i=-semiLado;i<=semiLado;i++){ |
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indiceY=origenY; |
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for(int j=-semiLado;j<=semiLado;j++){ |
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raster.getElemShort(indiceY,indiceX,px); |
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ventanaR[i+semiLado][j+semiLado] =px[0];
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ventanaG[i+semiLado][j+semiLado] =px[1];
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ventanaB[i+semiLado][j+semiLado] =px[2];
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indiceY=indiceY+stepY[contY+j+1];
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k++; |
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} |
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indiceX=indiceX+stepX[contX+i+1];
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} |
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//**************************************************************************************************
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kernelRGB[0]= new Kernel(ventanaR); |
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kernelRGB[1]= new Kernel(ventanaG); |
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kernelRGB[2]= new Kernel(ventanaB); |
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} |
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} |
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return kernelRGB;
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} |
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} |