Revision 5497 trunk/extensions/extRasterTools/src/org/gvsig/rasterTools/brightnessContrast/filter/HistogramImageFilter.java
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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.gvsig.rasterTools.brightnessContrast.filter; |
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import java.awt.Image; |
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import java.awt.image.BufferedImage; |
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import java.util.Vector; |
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/** |
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* Matriz donde se van a almacenar los histogramas. |
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*/ |
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int histoRed[]; |
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int histoGreen[]; |
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int histoBlue[]; |
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int histoRed[] = new int[256];
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int histoGreen[] = new int[256];
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int histoBlue[] = new int[256];
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/** |
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* Constructor |
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* |
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} |
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public void pre(){
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this.exec=true; |
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this.image = (Image) params.get("raster");
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this.imgWidth = image.getWidth(null);
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this.imgHeight = image.getHeight(null);
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this.width = image.getWidth(null);
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this.height = image.getHeight(null);
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for(int i = 0 ; i <= 255 ; i++){
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histoRed[i]= 0; |
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histoGreen[i] = 0; |
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histoBlue[i] = 0; |
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} |
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super.pre(); |
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} |
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public void post() {
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// TODO Auto-generated method stub |
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} |
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public void process(int x, int y) {
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int px = ((BufferedImage) image).getRGB(x, y); |
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int px3[] = {(px & 0xff0000) >> 16, (px & 0xff00) >> 8, (px & 0xff)};
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this.histoRed[px3[0]]++; //Histograma para la banda R |
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this.histoGreen[px3[1]]++; //Histograma para la banda G |
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this.histoBlue[px3[2]]++; //Histograma para la banda B |
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this.histoRed[px3[0]]+=1; //Histograma para la banda R |
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this.histoGreen[px3[1]]+=1; //Histograma para la banda G |
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this.histoBlue[px3[2]]+=1; //Histograma para la banda B |
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pixel++; //Cuenta de los pixels de la imagen |
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} |
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/** |
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int suma = 0; |
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for (int i = 1 ; i <= 255 ; i++){
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suma += vector[i]; |
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suma += vector[i]*i;
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} |
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media = suma/255;
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media = suma/pixel;
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return media; |
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} |
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public int getPixel(){
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return this.pixel; |
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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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} |
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/** |
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* Metodos para acceder al los valores medios de brillo para cada banda |
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* @return Media de brillo para la banda de color correspondiente. |
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*/ |
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public int getMediaRed(){
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return calculaMedia(this.histoRed); |
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} |
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public int getMediaGreen(){
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return calculaMedia(this.histoGreen); |
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} |
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public int getMediaBlue(){
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return calculaMedia(this.histoBlue); |
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} |
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/** |
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* Metodos para acceder desde fuera a los histogramas calculados por el filtro |
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* @return Histogramas de cada una de las bandas de color. |
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return (Object) this.histoBlue; |
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} |
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/** |
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* Metodos para acceder al los valores medios de brillo para cada banda |
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* @return Media de brillo para la banda de color correspondiente. |
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*/ |
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int mediaRed(){
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return calculaMedia(this.histoRed); |
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} |
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int mediaGreen(){
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return calculaMedia(this.histoGreen); |
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} |
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int mediaBlue(){
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return calculaMedia(this.histoBlue); |
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} |
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} |
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