Silhouette Rendering Apparatus and Method with 3D Temporal Coherence For Rigid Object

A silhouette rendering apparatus using temporal coherence in a 3D(Three-Dimensional) space and a method thereof are provided to obtain temporal coherence of silhouette rendering stylization effectively reflecting the shape of a 3D object. A 3D mesh(10) is information processed by a camera or the like or information indicating a mesh configuration with coordinate values according to data obtained from operation by a graphic designer. A silhouette edge extracting module(20) extracts edges of a 3D object of the 3D mesh by using a smooth surface method that generates edges on a surface among a silhouette extraction algorithm. A stroke generating module(30) generates a stroke by connecting edges obtained by the edge extracting module. A parameter calculating module(40) determines an associated stroke based on motion information of an object and the camera extracted from a current frame and a previous frame of the generated stroke and calculates and sets a style-related parameter of the corresponding stroke. A silhouette rendering module(50) directly extracts animation information of a silhouette line from animation information of the object and the camera, and renders it by using a relevant parameter of the stroke such that temporal coherence of the silhouette line is maintained.