1 package org.opencv.test.features2d;
2 
3 import org.opencv.core.CvType;
4 import org.opencv.core.Mat;
5 import org.opencv.core.MatOfKeyPoint;
6 import org.opencv.core.Point;
7 import org.opencv.core.Scalar;
8 import org.opencv.core.KeyPoint;
9 import org.opencv.test.OpenCVTestCase;
10 import org.opencv.test.OpenCVTestRunner;
11 import org.opencv.imgproc.Imgproc;
12 import org.opencv.features2d.Feature2D;
13 
14 public class BRIEFDescriptorExtractorTest extends OpenCVTestCase {
15 
16     Feature2D extractor;
17     int matSize;
18 
getTestImg()19     private Mat getTestImg() {
20         Mat cross = new Mat(matSize, matSize, CvType.CV_8U, new Scalar(255));
21         Imgproc.line(cross, new Point(20, matSize / 2), new Point(matSize - 21, matSize / 2), new Scalar(100), 2);
22         Imgproc.line(cross, new Point(matSize / 2, 20), new Point(matSize / 2, matSize - 21), new Scalar(100), 2);
23 
24         return cross;
25     }
26 
27     @Override
setUp()28     protected void setUp() throws Exception {
29         super.setUp();
30         extractor = createClassInstance(XFEATURES2D+"BriefDescriptorExtractor", DEFAULT_FACTORY, null, null);
31         matSize = 100;
32     }
33 
testComputeListOfMatListOfListOfKeyPointListOfMat()34     public void testComputeListOfMatListOfListOfKeyPointListOfMat() {
35         fail("Not yet implemented");
36     }
37 
testComputeMatListOfKeyPointMat()38     public void testComputeMatListOfKeyPointMat() {
39         KeyPoint point = new KeyPoint(55.775577545166016f, 44.224422454833984f, 16, 9.754629f, 8617.863f, 1, -1);
40         MatOfKeyPoint keypoints = new MatOfKeyPoint(point);
41         Mat img = getTestImg();
42         Mat descriptors = new Mat();
43 
44         extractor.compute(img, keypoints, descriptors);
45 
46         Mat truth = new Mat(1, 32, CvType.CV_8UC1) {
47             {
48                 put(0, 0, 96, 0, 76, 24, 47, 182, 68, 137,
49                           149, 195, 67, 16, 187, 224, 74, 8,
50                           82, 169, 87, 70, 44, 4, 192, 56,
51                           13, 128, 44, 106, 146, 72, 194, 245);
52             }
53         };
54 
55         assertMatEqual(truth, descriptors);
56     }
57 
testCreate()58     public void testCreate() {
59         assertNotNull(extractor);
60     }
61 
testDescriptorSize()62     public void testDescriptorSize() {
63         assertEquals(32, extractor.descriptorSize());
64     }
65 
testDescriptorType()66     public void testDescriptorType() {
67         assertEquals(CvType.CV_8U, extractor.descriptorType());
68     }
69 
testEmpty()70     public void testEmpty() {
71 //        assertFalse(extractor.empty());
72         fail("Not yet implemented"); // BRIEF does not override empty() method
73     }
74 
testRead()75     public void testRead() {
76         String filename = OpenCVTestRunner.getTempFileName("yml");
77         writeFile(filename, "%YAML:1.0\n---\ndescriptorSize: 64\n");
78 
79         extractor.read(filename);
80 
81         assertEquals(64, extractor.descriptorSize());
82     }
83 
testWrite()84     public void testWrite() {
85         String filename = OpenCVTestRunner.getTempFileName("xml");
86 
87         extractor.write(filename);
88 
89         String truth = "<?xml version=\"1.0\"?>\n<opencv_storage>\n<descriptorSize>32</descriptorSize>\n</opencv_storage>\n";
90         assertEquals(truth, readFile(filename));
91     }
92 
testWriteYml()93     public void testWriteYml() {
94         String filename = OpenCVTestRunner.getTempFileName("yml");
95 
96         extractor.write(filename);
97 
98         String truth = "%YAML:1.0\n---\ndescriptorSize: 32\n";
99         assertEquals(truth, readFile(filename));
100     }
101 
102 }
103