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.gui.Roi;
013import ij.plugin.filter.PlugInFilter;
014import ij.process.ImageProcessor;
015import imagingbook.core.jdoc.JavaDocHelp;
016
017import java.awt.Point;
018
019/**
020 * This ImageJ plugin shows processing the inside of the currently selected region of interest (ROI) using the
021 * {@link Point} iterator of {@link Roi}. The plugin works for RGB color images and merely inverts the each pixel
022 * contained in the ROI.
023 *
024 * @author WB
025 * @version 2022/04/01
026 */
027public class Roi_Processing_Demo2 implements PlugInFilter, JavaDocHelp {
028
029        private ImagePlus im;
030
031        public int setup(String arg, ImagePlus im) {
032                this.im = im;
033                return DOES_8G + ROI_REQUIRED;
034        }
035
036        public void run(ImageProcessor ip) {
037                Roi roi = im.getRoi();
038                
039                // Use Roi's Point iterator to visit all contained pixels:
040                for (Point pnt : roi) {
041                        int p = ip.getPixel(pnt.x, pnt.y);
042                        ip.putPixel(pnt.x, pnt.y, ~p);  // invert color values
043                }
044        }
045}