Watermarking Document Images with Bounding Box Expansion
Proceedings of the First International Workshop on Information Hiding
A Vector Watermarking Using the Generalized Square Mask
ITCC '01 Proceedings of the International Conference on Information Technology: Coding and Computing
Illustration Watermarks for Vector Graphics
PG '03 Proceedings of the 11th Pacific Conference on Computer Graphics and Applications
Reversible watermarking of 2D-vector data
Proceedings of the 2004 workshop on Multimedia and security
The Art of Error Correcting Coding
The Art of Error Correcting Coding
Watermarking Polygonal Lines Using Fourier Descriptors
IEEE Computer Graphics and Applications
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In this paper we present a blind watermarking scheme for vector-based fonts. The scheme can be used for authenticating the copyright holder as well as for identifying customers of fonts. We slightly modify the symmetry between curve pairs to embed a binary message. The watermark is invisible and robust against conversion into other vector-based font formats. An implementation for TrueType-Fonts was evaluated by typeface designers.Based on the blind watermarking scheme we discuss an extension to a non-blind watermark, which is in addition robust against uniform scaling.