1 /**
2 * Copyright (c) 2011, The University of Southampton and the individual contributors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * * Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 *
11 * * Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * * Neither the name of the University of Southampton nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 package org.openimaj.image.processing.morphology;
31
32 import org.openimaj.image.FImage;
33 import org.openimaj.image.pixel.ConnectedComponent;
34 import org.openimaj.image.processor.ImageProcessor;
35 import org.openimaj.image.processor.connectedcomponent.ConnectedComponentProcessor;
36
37 /**
38 * Morphological thinning of connected components and (assumed binary) FImages.
39 *
40 * @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
41 */
42 public class Thin implements ConnectedComponentProcessor, ImageProcessor<FImage> {
43 protected HitAndMiss hitAndMiss;
44
45 /**
46 * Construct the thinning operator with the given structuring element
47 * @param se the structuring element
48 */
49 public Thin(StructuringElement... se) {
50 this.hitAndMiss = new HitAndMiss(se);
51 }
52
53 @Override
54 public void process(ConnectedComponent cc) {
55 hitAndMiss.process(cc);
56
57 cc.getPixels().removeAll(hitAndMiss.outputPixels);
58 }
59
60 /* (non-Javadoc)
61 * @see org.openimaj.image.processor.ImageProcessor#processImage(org.openimaj.image.Image)
62 */
63 @Override
64 public void processImage(FImage image) {
65 FImage newImage = image.process(hitAndMiss, true);
66
67 for (int y=0; y<newImage.height; y++) {
68 for (int x=0; x<newImage.width; x++) {
69 if (newImage.pixels[y][x] == 1) {
70 image.pixels[y][x] = 0;
71 }
72 }
73 }
74 }
75 }