001/*******************************************************************************
002 * This software is provided as a supplement to the authors' textbooks on digital
003 * image processing published by Springer-Verlag in various languages and editions.
004 * Permission to use and distribute this software is granted under the BSD 2-Clause
005 * "Simplified" License (see http://opensource.org/licenses/BSD-2-Clause).
006 * Copyright (c) 2006-2023 Wilhelm Burger, Mark J. Burge. All rights reserved.
007 * Visit https://imagingbook.com for additional details.
008 ******************************************************************************/
009package ImageJ_Demos;
010
011import ij.ImagePlus;
012import ij.plugin.filter.PlugInFilter;
013import ij.process.ImageProcessor;
014import imagingbook.core.jdoc.JavaDocHelp;
015
016/**
017 * This is a minimal ImageJ plugin (PlugInFilter) that inverts an 8-bit grayscale (byte) image.
018 *
019 * @author WB
020 */
021public class My_Inverter_A implements PlugInFilter, JavaDocHelp {
022
023        public int setup(String args, ImagePlus im) {
024                return DOES_8G; // this plugin accepts 8-bit grayscale images 
025        }
026
027        public void run(ImageProcessor ip) {
028                int M = ip.getWidth();
029                int N = ip.getHeight();
030
031                // iterate over all image coordinates
032                for (int u = 0; u < M; u++) {
033                        for (int v = 0; v < N; v++) {
034                                int p = ip.getPixel(u, v);
035                                ip.putPixel(u, v, 255 - p);
036                        }
037                }
038        }
039
040}