create Monochrome Image - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Create

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Description

create Monochrome Image

Demo Code

/*/*from   ww w  . j a  v a  2 s .  c o  m*/
    JPC: An x86 PC Hardware Emulator for a pure Java Virtual Machine
    Release Version 2.4

    A project from the Physics Dept, The University of Oxford

    Copyright (C) 2007-2010 The University of Oxford

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License version 2 as published by
    the Free Software Foundation.

    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.
         
    Details (including contact information) can be found at: 

    jpc.sourceforge.net
    or the developer website
    sourceforge.net/projects/jpc/

    Conceived and Developed by:
    Rhys Newman, Ian Preston, Chris Dennis

    End of licence header
 */
//package com.java2s;
import java.awt.*;

import java.awt.image.*;

public class Main {
    public static BufferedImage createMonochromeImage(BufferedImage src) {
        return createMonochromeImage(src, Color.white);
    }

    public static BufferedImage createMonochromeImage(BufferedImage src,
            Color tgt) {
        BufferedImage result = new BufferedImage(src.getWidth(),
                src.getHeight(), BufferedImage.TYPE_INT_ARGB);
        int r1 = tgt.getRed();
        int g1 = tgt.getGreen();
        int b1 = tgt.getBlue();

        for (int i = 0; i < src.getWidth(); i++)
            for (int j = 0; j < src.getHeight(); j++) {
                int rgb = src.getRGB(i, j);

                int a = 0xFF & (rgb >> 24);
                int r = 0xFF & (rgb >> 16);
                int g = 0xFF & (rgb >> 8);
                int b = 0xFF & rgb;

                double grey = (76.0 * r + 150.0 * g + 28.0 * b) / 256 / 256;

                r = (int) (grey * r1);
                g = (int) (grey * g1);
                b = (int) (grey * b1);

                rgb = (a << 24) | (r << 16) | (g << 8) | b;
                result.setRGB(i, j, rgb);
            }

        return result;
    }
}

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