Get the lightness associated to the given Color . - Java 2D Graphics

Java examples for 2D Graphics:Color

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Description

Get the lightness associated to the given Color .

Demo Code

/**// www. ja  v a 2  s . c om
 * OrbisGIS is a java GIS application dedicated to research in GIScience.
 * OrbisGIS is developed by the GIS group of the DECIDE team of the 
 * Lab-STICC CNRS laboratory, see <http://www.lab-sticc.fr/>.
 *
 * The GIS group of the DECIDE team is located at :
 *
 * Laboratoire Lab-STICC ? CNRS UMR 6285
 * Equipe DECIDE
 * UNIVERSIT? DE BRETAGNE-SUD
 * Institut Universitaire de Technologie de Vannes
 * 8, Rue Montaigne - BP 561 56017 Vannes Cedex
 * 
 * OrbisGIS is distributed under GPL 3 license.
 *
 * Copyright (C) 2007-2014 CNRS (IRSTV FR CNRS 2488)
 * Copyright (C) 2015-2016 CNRS (Lab-STICC UMR CNRS 6285)
 *
 * This file is part of OrbisGIS.
 *
 * OrbisGIS 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 3 of the License, or (at your option) any later
 * version.
 *
 * OrbisGIS 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
 * OrbisGIS. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, please consult: <http://www.orbisgis.org/>
 * or contact directly:
 * info_at_ orbisgis.org
 */
//package com.java2s;
import java.awt.Color;

public class Main {
    /**
     * The greatest possible value foa a RGB component.
     */
    public static final int MAX_RGB_VALUE = 255;

    /**
     * Get the lightness associated to the given {@code Color}.
     *
     * @param color
     * @return
     * The lightness, as a float between 0 and 1.
     */
    public static float getLightness(Color color) {
        int r = color.getRed();
        int g = color.getGreen();
        int b = color.getBlue();

        int max = Math.max(r, Math.max(g, b));
        int min = Math.min(r, Math.min(g, b));

        return ((max + min) * 0.5f) / (float) MAX_RGB_VALUE;
    }
}

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