Abstract
This paper presents a robust watermarking algorithm with informed detection for 3D polygonal meshes.
The algorithm is based on our previous algorithm that employs mesh-spectral analysis to modify
mesh shapes in their transformed domain. This paper presents extensions to our previous algorithm so
that (1) much larger meshes can be watermarked within a reasonable time, and that (2) the watermark is
robust against connectivity alteration (e.g., mesh simplification), and that (3) the watermark is robust
against attacks that combine similarity transformation with such other attacks as cropping, mesh
simplification, and smoothing. Experiment showed that our new watermarks are resistant against mesh
simplification and remeshing combined with resection, similarity transformation, and other operations..
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