In this paper, we present a novel technique called Point Cloud Graph Attention Network (PCGattnNet) to detect face presentation attacks using 3D point clouds captured from a smartphone. The innovative ...

3.1 KNN graphs. Given 3D point cloud data, the model forms a set of KNN graphs, where the nodes represent 3D points, and each node is connected to its k closest nodes using edges. The parameter k ...

With the development of 3D laser scanning techniques and depth sensors, 3D dynamic point clouds have attracted increasing attention as a representation of 3D objects in motion, enabling various ...