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ICME10-2dvec-wm Material

This is "The Multimedia Signal Processing and Security Lab", short WaveLab, website. We are a research group at the Computer Sciences Department of the University of Salzburg headed by Andreas Uhl. The short name "WaveLab" already indicates that wavelets are among our favorite tools - we have 15 years of experience in this area. Our research is focused on Multimedia Security including Watermarking, Image and Video Compression, Medical Image Classification, and Biometrics.
Supplementary material for the 2D vector graphics distortion constraint watermarking proposed in

Stefan Huber, Roland Kwitt, Peter Meerwald, Martin Held, Andreas Uhl, "Watermarking of 2D Vector Graphics with Distortion Constraint", In Proceedings of the IEEE International Conference on Multimedia & Expo (ICME '10), pp. 480-485, Singapore, July 19 - 23, 2010

Abstract: We study the watermarking of 2D vector data and introduce a framework which preserves topological properties of the input. Our framework is based on so-called maximum perturbation regions (MPR) of the input vertices, which is a concept similar to the just-noticeable-difference constraint. The MPRs are computed by means of the Voronoi diagram of the input and allow us to avoid (self-)intersections of input objects that might result from the embedding of the watermark. We demonstrate and analyze the applicability of this new framework by coupling it with a well-known approach to watermarking that is based on Fourier descriptors. However, our framework is general enough such that any robust scheme for the watermarking of vector data can be applied.

Here are some supplementary results (PDF) that did not fit in the paper.

OpenStreetMap data of Salzburg:

SVG / .line / PNG

Data from the Open Clip Art library:

SVG / .line SVG / .line SVG / .line SVG / .line SVG / .line SVG / .line SVG / .line
The graphics have been scanned and vectorized based on image donated by Pearson Scott Foresman to the public domain.

See README for details.

The code is available upon request.

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