public SiftFeature(VlSiftKeypoint keypoint, SiftKeyPointOrientation[] keypointOrientations)
{
this.keypoint = keypoint;
this.keypointOrientations = keypointOrientations;
}
public SiftKeyPointOrientation[] keypointOrientations; //关键点的方向及方向对应的描述
#endregion Fields
#region Constructors
public SiftFeature(VlSiftKeypoint keypoint)
: this(keypoint, null)
{
}
public static extern int vl_sift_calc_keypoint_orientations(IntPtr f, double[] angles, ref VlSiftKeypoint k);
public static extern void vl_sift_keypoint_init(IntPtr f, ref VlSiftKeypoint k, double x, double y, double sigma);
public static extern void vl_sift_calc_keypoint_descriptor(IntPtr f, IntPtr descr, ref VlSiftKeypoint k, double angle);