Application: gvSIG desktop

/*

 * Created on 17-feb-2004

 *

 * To change the template for this generated file go to

 * Window>Preferences>Java>Code Generation>Code and Comments

 */

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package org.cresques.io.raster;

/**

 * Clase base para los filtros de realzado lineal. Lee el m?nimo y m?xmo de la clase

 * RasterStats que ser?n calculados por PercentTailTrimFilter o ComputeMinMaxFilter dependiendo

 * de si est? activado el recorte de colas o no. En RasterStats tambi?n est?n los segundos 

 * valores despu?s del m?nimo y m?ximo que son los que se utilizan con la opci?n eliminar 

 * extremos activada. Estos se usaran en vez del m?nimo y m?ximo cuando la variable 

 * removeExtrema est? a true.

 */

public abstract class LinearEnhancementFilter extends RasterFilter {

        protected double [] scale = new double[3];

        protected double [] offset = new double[3];

        protected int []         minBandValue = null;

        protected int []         maxBandValue = null;

        protected boolean        removeExtrema = false;

        protected String        filename = null;

        public LinearEnhancementFilter(){

                super();

        }

        public void pre(){

                if(removeExtrema){        //Si est? activado eliminar extremos gastamos el 2? m?ximo/m?nimo

                        if(filename!=null && !filename.equals("")){

                                for(int i=0;i<stats.history.size();i++){

                                        RasterStats.History history = (RasterStats.History)stats.history.get(i);

                                        if(history.file.equals(filename.substring((filename.lastIndexOf("/")+1), filename.length()))){

                                                this.minBandValue = history.secMin;

                                                this.maxBandValue = history.secMax;

                                        }

                                }

                        }

                        if(this.minBandValue == null || this.maxBandValue == null){

                                this.minBandValue = stats.secondMinBandValue;

                                this.maxBandValue = stats.secondMaxBandValue;

                        }

                }else{                                //Si no est? activado eliminar extremos

                        if(filename!=null && !filename.equals("")){

                                for(int i=0;i<stats.history.size();i++){

                                        RasterStats.History history = (RasterStats.History)stats.history.get(i);

                                        if(history.file.equals(filename.substring((filename.lastIndexOf("/")+1), filename.length()))){

                                                this.minBandValue = history.min;

                                                this.maxBandValue = history.max;

                                        }

                                }

                        }

                        if(this.minBandValue == null || this.maxBandValue == null){

                                this.minBandValue = stats.minBandValue;

                                this.maxBandValue = stats.maxBandValue;

                        }

                }

                for (int i=0; i<3; i++) {

                        scale[i] = 255D/(maxBandValue[i]-minBandValue[i]);

                        offset[i] = (255D*minBandValue[i])/(minBandValue[i]-maxBandValue[i]);

                }

        }

        /**

         * Obtiene true si est? activado el flag de eliminar extremos y false si no lo est?

         */

        public Boolean getRemoveExtrema(){

                return new Boolean(removeExtrema);

        }

}