public static extern IntPtr rr_fv_extract_feature(IntPtr verifier_handle, IntPtr image_data, RrImageType image_type, int image_width, int image_height, byte[] face, ref RrFeatureT p_feature);
//public static extern IntPtr rr_fd_detect(IntPtr detector_handle, [MarshalAs(UnmanagedType.LPArray)]byte[] image_data, rr_image_type image_type, int image_width, int image_height, ref rr_face_t p_faces_array, ref int p_faces_count); public static extern IntPtr rr_fd_detect(IntPtr detector_handle, IntPtr image_data, RrImageType image_type, int image_width, int image_height, ref IntPtr p_faces_array, ref int p_faces_count);