/// <summary>
/// Determine dominant orientation for the feature point.
/// </summary>
///
public double GetOrientation(SpeededUpRobustFeaturePoint point)
{
// Get rounded feature point data
int x = (int)System.Math.Round(point.X, 0);
int y = (int)System.Math.Round(point.Y, 0);
int s = (int)System.Math.Round(point.Scale, 0);
// Get the orientation (for rotation invariance)
return(this.GetOrientation(x, y, s));
}
/// <summary>
/// Describes the specified point (i.e. computes and
/// sets the orientation and descriptor vector fields
/// of the <see cref="SpeededUpRobustFeaturePoint"/>.
/// </summary>
///
/// <param name="point">The point to be described.</param>
///
public void Compute(SpeededUpRobustFeaturePoint point)
{
// Get rounded feature point data
int x = (int)System.Math.Round(point.X, 0);
int y = (int)System.Math.Round(point.Y, 0);
int s = (int)System.Math.Round(point.Scale, 0);
if (this.invariant)
{
// Get the orientation (for rotation invariance)
point.Orientation = this.GetOrientation(x, y, s);
}
// Extract SURF descriptor
point.Descriptor = this.GetDescriptor(x, y, s, point.Orientation);
}