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.neardups.sim;
31
32 import org.openimaj.image.MBFImage;
33
34 /**
35 * Simulate rotations by 90,180,270,0 degrees
36 *
37 * @author jsh2
38 *
39 */
40 public class Rotate90Simulation extends Simulation {
41 public Rotate90Simulation(int seed) {
42 super(seed);
43 }
44
45 @Override
46 public MBFImage applySimulation(MBFImage input) {
47 int angle = random.nextInt(4);
48 MBFImage output = null;
49
50 switch (angle) {
51 case 0:
52 output = input.clone();
53 break;
54 case 1:
55 output = new MBFImage(input.getHeight(), input.getWidth(), input.numBands());
56 for (int j=0; j<output.getHeight(); j++) {
57 for (int i=0; i<output.getWidth(); i++) {
58 output.setPixel(i, j, input.getPixel(j, i));
59 }
60 }
61 break;
62 case 2:
63 output = new MBFImage(input.getWidth(), input.getHeight(), input.numBands());
64 for (int j=0; j<output.getHeight(); j++) {
65 for (int i=0; i<output.getWidth(); i++) {
66 output.setPixel(i, j, input.getPixel(i, input.getHeight() - j - 1));
67 }
68 }
69 break;
70 case 3:
71 output = new MBFImage(input.getHeight(), input.getWidth(), input.numBands());
72 for (int j=0; j<output.getHeight(); j++) {
73 for (int i=0; i<output.getWidth(); i++) {
74 output.setPixel(i, j, input.getPixel(input.getWidth() - j - 1, i));
75 }
76 }
77 break;
78 }
79
80 return output;
81 }
82
83 }