Watermarking technique for authentication of 3-d polygonal meshes

Authors:
Wan-Hyun Cho;Myung-Eun Lee;Hyun Lim;Soon-Young Park
Affiliations:
Department of Statistics, Chonnam National University, S. Korea;Department of Electronics Engineering, Mokpo National University, S. Korea;DVMM Lab., Dept. of Electrical Engineering, Columbia University;Department of Electronics Engineering, Mokpo National University, S. Korea
Venue:
IWDW'04 Proceedings of the Third international conference on Digital Watermarking
Year:
2004

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Abstract

In this paper, we present a watermarking technique for authentication of 3-D polygonal meshes. The proposed technique is based on a wavelet-based multiresolution analysis to convert an original polygonal mesh model into a simplified mesh model and wavelet coefficient vectors. The embedding procedure is to modify the vertex of a simplified mesh model at a low resolution according to the order of norms of the wavelet coefficient vectors using a look-up table. The watermark extraction process is to restore the binary logo pattern by extracting a binary watermark bit from a look-up table corresponding to the watermarked simple mesh. The experimental results show that the proposed method is invariant to the location, scale and rotation transformation while detecting unauthorized modifications.