Java BufferedImage Sharpen sharpen(final BufferedImage image)

Description

sharpen

License

Open Source License

Declaration

public static BufferedImage sharpen(final BufferedImage image) 

Method Source Code

//package com.java2s;
/*// ww w  .j a  va 2 s.com
 * Gestalt
 *
 * Copyright (C) 2012 Patrick Kochlik + Dennis Paul
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * {@link http://www.gnu.org/licenses/lgpl.html}
 *
 */

import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ConvolveOp;

import java.awt.image.Kernel;

public class Main {
    public static BufferedImage sharpen(final BufferedImage image) {
        float[] elements = { 0.0f, -1.0f, 0.0f, -1.0f, 5.f, -1.0f, 0.0f, -1.0f, 0.0f };
        return convolve(image, elements, 3, 3);
    }

    public static BufferedImage convolve(final BufferedImage image, float[] elements, int theWidth, int theHeight) {
        Kernel kernel = new Kernel(theWidth, theHeight, elements);
        ConvolveOp op = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);
        return filter(image, op);
    }

    public static BufferedImage filter(final BufferedImage image, BufferedImageOp op) {
        BufferedImage filteredImage = new BufferedImage(image.getWidth(), image.getHeight(), image.getType());
        op.filter(image, filteredImage);
        return filteredImage;
    }
}

Related

1. sharpen(BufferedImage image)
2. sharpen(BufferedImage img, BufferedImage dest)
3. sharpenOp()