Beispiel #1
0
        public void ProcessImageTest()
        {
            var bitmaps = SpeededUpRobustFeaturesDetectorTest.GetImages();

            foreach (Bitmap img in bitmaps)
            {
                bool upright  = true;
                bool extended = false;

                List <SpeededUpRobustFeaturePoint> expected;
                List <SpeededUpRobustFeaturePoint> actual;

                // Create OpenSURF detector by Chris Evans
                {
                    // Create Integral Image
                    var clone = Accord.Imaging.Image.Clone(img);
                    OpenSURFcs.IntegralImage iimg = OpenSURFcs.IntegralImage.FromImage(clone);

                    // Extract the interest points
                    var pts = OpenSURFcs.FastHessian.getIpoints(0.0002f, 5, 2, iimg);

                    // Describe the interest points
                    OpenSURFcs.SurfDescriptor.DecribeInterestPoints(pts, upright, extended, iimg);

                    expected = new List <SpeededUpRobustFeaturePoint>();
                    foreach (var p in pts)
                    {
                        expected.Add(new SpeededUpRobustFeaturePoint(
                                         p.x, p.y, p.scale,
                                         p.laplacian, p.orientation,
                                         p.response, p.descriptor.ToDouble()));
                    }
                }

                {
                    // Create the detector
                    var surf = new SpeededUpRobustFeaturesDetector(0.0002f, 5, 2);

                    // Extract interest points
                    var clone = Accord.Imaging.Image.Clone(img);
                    actual = surf.ProcessImage(clone);

                    // Describe the interest points
                    var descriptor = surf.GetDescriptor();
                    descriptor.Invariant = !upright;
                    descriptor.Extended  = extended;

                    foreach (var expectedPoint in expected)
                    {
                        var actualPoint = new SpeededUpRobustFeaturePoint(
                            expectedPoint.X,
                            expectedPoint.Y,
                            expectedPoint.Scale,
                            expectedPoint.Laplacian);

                        descriptor.Compute(actualPoint);

                        Assert.AreEqual(expectedPoint.X, actualPoint.X);
                        Assert.AreEqual(expectedPoint.Y, actualPoint.Y);
                        Assert.AreEqual(expectedPoint.Scale, actualPoint.Scale);
                        Assert.AreEqual(expectedPoint.Orientation, actualPoint.Orientation);
                        Assert.AreEqual(expectedPoint.Response, actualPoint.Response);
                        Assert.AreEqual(expectedPoint.Descriptor.Length, actualPoint.Descriptor.Length);

                        for (int i = 0; i < expectedPoint.Descriptor.Length; i++)
                        {
                            double e = expectedPoint.Descriptor[i];
                            double a = actualPoint.Descriptor[i];

                            double u = System.Math.Abs(e - a);
                            double v = System.Math.Abs(e);
                            Assert.AreEqual(e, a, 0.05);
                        }
                    }
                }
            }
        }