public void describe_points()
{
if (!detected)
{
return;
}
SurfDescriptor.DecribeInterestPoints(ipts, false, false, iimg);
descriptor_length = 64;
described = true;
int length = ipts.Count;
connection_id = new int[length];
for (int i = 0; i < length; i++)
{
connection_id[i] = -1;
}
}
private void button1_Click(object sender, EventArgs e)
{
// Open a image
Bitmap lenna = Surf.Properties.Resources.lena512;
// Create a new SURF Features Detector using the given parameters
SpeededUpRobustFeaturesDetector surf =
new SpeededUpRobustFeaturesDetector(0.0002f, 5, 2);
var points = surf.ProcessImage(lenna);
// Get the SURF Features Descriptor from the detector
SurfDescriptor descriptor = surf.GetDescriptor();
descriptor.Describe(points);
// Create a new AForge's Corner Marker Filter
FeaturesMarker features = new FeaturesMarker(points.ToArray());
// Apply the filter and display it on a picturebox
pictureBox1.Image = features.Apply(lenna);
}
private void btnRunSurf_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.ShowDialog();
string pathToFile = openFileDialog.FileName;
Stopwatch watch = new Stopwatch();
watch.Start();
try
{
// Load an Image
Bitmap img = new Bitmap(pathToFile);
pbMainPicture.Image = img;
// Create Integral Image
IntegralImage iimg = IntegralImage.FromImage(img);
// Extract the interest points
ipts = FastHessian.getIpoints(0.0002f, 5, 2, iimg);
// Describe the interest points
SurfDescriptor.DecribeInterestPoints(ipts, false, false, iimg);
// Draw points on the image
PaintSURF(img, ipts);
}
catch
{
}
watch.Stop();
this.Text = "DemoSURF - Elapsed time: " + watch.Elapsed +
" for " + ipts.Count + "points";
}
public void ProcessImageTest()
{
// Load an Image
Bitmap img = Properties.Resources.sample_trans;
// Extract the interest points
var surf = new SpeededUpRobustFeaturesDetector(0.0002f, 5, 2);
List <SurfPoint> points = surf.ProcessImage(img);
// Describe the interest points
SurfDescriptor descriptor = surf.GetDescriptor();
descriptor.Describe(points);
Assert.AreEqual(8, points.Count);
SurfPoint p;
p = points[0];
Assert.AreEqual(0, p.Laplacian);
Assert.AreEqual(25.3803387, p.X, 1e-2);
Assert.AreEqual(14.7987738, p.Y, 1e-2);
Assert.AreEqual(1.98713827, p.Scale, 1e-2);
Assert.AreEqual(0.0, p.Response, 1e-2);
Assert.AreEqual(4.78528404, p.Orientation, 1e-2);
Assert.AreEqual(64, p.Descriptor.Length);
Assert.AreEqual(0.22572951, p.Descriptor[23], 1e-2);
Assert.AreEqual(0.0962982625, points[1].Descriptor[42], 1e-2);
p = points[1];
Assert.AreEqual(1, p.Laplacian, 1e-2);
Assert.AreEqual(20.4856224, p.X, 1e-2);
Assert.AreEqual(20.4817181, p.Y, 1e-2);
Assert.AreEqual(1.90549147, p.Scale, 1e-2);
Assert.AreEqual(0.0, p.Response, 1e-2);
Assert.AreEqual(4.89748764, p.Orientation, 1e-2);
Assert.AreEqual(64, p.Descriptor.Length);
Assert.AreEqual(0.14823015, p.Descriptor[23], 1e-2);
Assert.AreEqual(0.0861000642, p.Descriptor[54], 1e-2);
p = points[2];
Assert.AreEqual(0, p.Laplacian, 1e-2);
Assert.AreEqual(14.7991896, p.X, 1e-2);
Assert.AreEqual(25.3776169, p.Y, 1e-2);
Assert.AreEqual(1.9869982, p.Scale, 1e-2);
Assert.AreEqual(0.0, p.Response, 1e-2);
Assert.AreEqual(3.07735944, p.Orientation, 1e-2);
Assert.AreEqual(64, p.Descriptor.Length);
Assert.AreEqual(0.209485427, p.Descriptor[23], 1e-2);
Assert.AreEqual(0.0112418151, p.Descriptor[12], 1e-2);
p = points[6];
Assert.AreEqual(1, p.Laplacian, 1e-2);
Assert.AreEqual(22.4346638, p.X, 1e-2);
Assert.AreEqual(41.4026527, p.Y, 1e-2);
Assert.AreEqual(2.83586049, p.Scale, 1e-2);
Assert.AreEqual(0.0, p.Response, 1e-2);
Assert.AreEqual(3.13142157, p.Orientation, 1e-2);
Assert.AreEqual(64, p.Descriptor.Length);
Assert.AreEqual(0.0467314087, p.Descriptor[23], 1e-2);
Assert.AreEqual(0.0266618263, p.Descriptor[12], 1e-2);
descriptor.Extended = true;
descriptor.Invariant = false;
descriptor.Describe(points);
p = points[5];
Assert.AreEqual(1, p.Laplacian, 1e-3);
Assert.AreEqual(41.4027748, p.X, 1e-3);
Assert.AreEqual(22.4343891, p.Y, 1e-3);
Assert.AreEqual(2.83486962, p.Scale, 1e-3);
Assert.AreEqual(0.0, p.Response, 1e-3);
Assert.AreEqual(4.72728586, p.Orientation, 1e-3);
Assert.AreEqual(0.00786296651, p.Descriptor[67], 1e-3);
Assert.AreEqual(-0.0202884115, p.Descriptor[97], 1e-2);
}
