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.contour;
31
32 import static org.junit.Assert.assertTrue;
33
34 import java.util.List;
35
36 import org.junit.Test;
37 import org.openimaj.image.FImage;
38 import org.openimaj.image.pixel.Pixel;
39
40 /**
41 * Tests for the {@link MooreNeighborStrategy}
42 *
43 * @author Sina Samangooei (ss@ecs.soton.ac.uk)
44 *
45 */
46 public class MooreNeighborStrategyTest {
47
48 /**
49 * @throws Exception
50 */
51 @Test
52 public void testSimple() throws Exception {
53 final float[][] pixels = new float[][] {
54 new float[] { 0, 0, 0, 0, 0, 0 },
55 new float[] { 0, 0, 1, 1, 1, 0 },
56 new float[] { 0, 1, 0, 0, 1, 0 },
57 new float[] { 0, 0, 1, 1, 1, 0 },
58 new float[] { 0, 0, 0, 0, 0, 0 }
59 };
60
61 final FImage img = new FImage(pixels);
62
63 final ContourFollowingStrategy strat = new MooreNeighborStrategy();
64 final Pixel start = new Pixel(1, 2);
65 Pixel from = new Pixel(1, 3);
66 List<Pixel> contour = strat.contour(img, start, from);
67 assertTrue(contour.size() == img.sum());
68 from = new Pixel(2, 2);
69 contour = strat.contour(img, start, from);
70 assertTrue(contour.size() == img.sum() - 2);
71
72 }
73
74 /**
75 * @throws Exception
76 */
77 @Test
78 public void testOpenLoop() throws Exception {
79 final float[][] pixels = new float[][] {
80 new float[] { 0, 0, 0, 0, 0, 0, 0, 0 },
81 new float[] { 0, 0, 0, 0, 0, 0, 0, 0 },
82 new float[] { 0, 0, 0, 0, 0, 1, 1, 0 },
83 new float[] { 0, 0, 0, 1, 0, 0, 1, 0 },
84 new float[] { 0, 0, 0, 1, 0, 1, 1, 0 },
85 new float[] { 0, 0, 0, 0, 1, 1, 0, 0 },
86 new float[] { 0, 0, 0, 0, 0, 0, 0, 0 }
87 };
88
89 final FImage img = new FImage(pixels);
90
91 final MooreNeighborStrategy strat = new MooreNeighborStrategy();
92 final Pixel start = new Pixel(3, 4);
93 final Pixel from = new Pixel(3, 5);
94 strat.contour(img, start, from);
95 }
96
97 }