/// <summary>
/// Compute the signiture from the given location on the image
/// </summary>
/// <param name="image">The image to compute signiture from</param>
/// <param name="keypoint">The location of the key point</param>
/// <param name="patchSize">The size of the patch</param>
/// <returns>null if the signiture cannot be computed, otherwise the signiture itself is returned.</returns>
public float[] GetSigniture(Image <TColor, Byte> image, Point keypoint, int patchSize)
{
float[] result = new float[NumberOfClasses];
GCHandle handle = GCHandle.Alloc(result, GCHandleType.Pinned);
int count = RTreeClassifierExtern.CvRTreeClassifierGetSigniture(_ptr, image, ref keypoint, patchSize, handle.AddrOfPinnedObject());
handle.Free();
return(count == 0 ? null : result);
}
