Hierarchical Watermarking of Semiregular Meshes Based on Wavelet Transform

This paper presents a hierarchical watermarking framework for semiregular meshes. Three blind watermarks are inserted in a semiregular mesh with different purposes: a geometrically robust watermark for copyright protection, a high-capacity watermark for carrying a large amount of auxiliary information, and a fragile watermark for content authentication. The proposed framework is based on wavelet transform of the semiregular mesh. More precisely, the three watermarks are inserted in different appropriate resolution levels obtained by wavelet decomposition of the mesh: the robust watermark is inserted by modifying the norms of the wavelet coefficient vectors associated with the lowest resolution level; the fragile watermark is embedded in the high resolution level obtained just after one wavelet decomposition by modifying the orientations and norms of the wavelet coefficient vectors; the high-capacity watermark is inserted in one or several intermediate levels by considering groups of wa...

• Type: Journal
• Year: 2008
• Where: TIFS
• Authors: Kai Wang, Guillaume Lavoué, Florence Denis, Atilla Baskurt
• Keywords: Robust Watermark, TIFS 2008, Watermark, Wavelet Coefficient Vector