Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.raster.impl.grid.filter.band;

/**

 * Filtro de balance de colores para tipo de datos byte.

 *

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class ColorBalanceRGBByteFilter extends ColorBalanceRGBFilter {

        public void process(int col, int line) {

                byte[] value = new byte[4];

                value[0] = raster.getElemByte(line, col, redBandNumber);

                value[1] = raster.getElemByte(line, col, greenBandNumber);

                value[2] = raster.getElemByte(line, col, blueBandNumber);

                value[3] = (byte)255;

                double lum = colorConversion.getLuminosity(value[0] & 0xff, value[1] & 0xff, value[2] & 0xff);

                value[0] = (byte)Math.min((value[0] & 0xff) + (red >> 1), 255);

                value[1] = (byte)Math.min((value[1] & 0xff) + (green >> 1), 255);

                value[2] = (byte)Math.min((value[2] & 0xff) + (blue >> 1), 255);

                if(luminosity) {

                        double[] hsl = colorConversion.RGBtoHSL(value[0] & 0xff, 

                                                                                                        value[1] & 0xff, 

                                                                                                        value[2] & 0xff);

                        hsl[0] = (int)(255.0 * hsl[0] / 360.0 + 0.5);

                        hsl[1] = (int) (hsl[1] * 255. + 0.5);

                        hsl[2] = (int) (lum * 255. + 0.5);

                        int[] v1 = colorConversion.HSLtoRGB((int)(((int)hsl[0]) & 0xffffffff), 

                                                                                                (int)(((int)hsl[1]) & 0xffffffff), 

                                                                                                (int)(((int)hsl[2]) & 0xffffffff));

                        byte[] v = new byte[4];

                        for (int band = 0; band < 3; band++)

                                v[band] = (byte)v1[band];

                        v[3] = value[3];

                        rasterResult.setElemByte(line, col, v);

                } else

                        rasterResult.setElemByte(line, col, value);

                writeAlphaBand(line, col);

        }

}