R. Ohbuchi et al., DATA EMBEDDING ALGORITHMS FOR GEOMETRICAL AND NON-GEOMETRICAL TARGETSIN 3-DIMENSIONAL POLYGONAL MODELS, Computer communications, 21(15), 1998, pp. 1344-1354
Three-dimensional (3D) graphics is about to become a full-fledged mult
imedia data type, prompted by the increasing popularity of virtual rea
lity modeling language (VRML) [15] and imminent standardization of MPE
G-4 [16]. This paper presents several algorithms for embedding data in
triangular meshes, arguably the most important component in both VRML
and MPEG4 in defining arbitrary shapes. A topology-modifying algorith
m described in this paper embeds bit string in connectivity of triangl
es, while another algorithm cuts out patterns from a mesh. Yet another
algorithm modifies texture coordinate, a non-geometrical quantity, fo
r embedding. Watermarks embedded in 3D graphics contents could be used
as a tool in managing intellectual property and other issues associat
ed with these contents. (C) 1998 Elsevier Science B.V. All rights rese
rved.