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.pixel.statistics;
31
32 import static org.junit.Assert.*;
33
34 import org.apache.commons.math.random.MersenneTwister;
35 import org.junit.Test;
36 import org.openimaj.image.FImage;
37 import org.openimaj.image.pixel.sampling.FLineSampler;
38 import org.openimaj.math.geometry.line.Line2d;
39 import org.openimaj.math.geometry.shape.Rectangle;
40
41 /**
42 * Tests for {@link FStatisticalPixelProfileModel}.
43 *
44 * @author Jonathon Hare (jsh2@ecs.soton.ac.uk)
45 *
46 */
47 public class FPixelProfileModelTest {
48 /**
49 * Test with some random images
50 */
51 @Test
52 public void test1() {
53 MersenneTwister mt = new MersenneTwister(99);
54
55 FStatisticalPixelProfileModel ppm = new FStatisticalPixelProfileModel(5, FLineSampler.INTERPOLATED_DERIVATIVE);
56 FImage img = new FImage(200, 200);
57 for (int i=0; i<100; i++) {
58 float gl = (float) (0.5 + (mt.nextGaussian() / 10.0));
59 int x = (int) (100.0 + mt.nextGaussian() / 2.0);
60
61 img.fill(0);
62 img.drawShapeFilled(new Rectangle(100,0,100,200), gl);
63
64 Line2d line = new Line2d(x+2, 50, x-2, 50);
65
66 ppm.updateModel(img, line);
67 }
68
69 int x = 102;
70 img.fill(0);
71 img.drawShapeFilled(new Rectangle(100,0,100,200), 0.5f);
72 while (true) {
73 Line2d line = new Line2d(x+4, 50, x-4, 50);
74
75 int newx = (int) ppm.computeNewBest(img, line, 9).getX();
76
77 if (newx == x)
78 break;
79
80 x = newx;
81 }
82
83 assertEquals(100, x);
84 }
85 }