Digital Geographical Map Watermarking Using Polyline Interpolation
PCM '02 Proceedings of the Third IEEE Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
A digital watermark for vector-based fonts
MM&Sec '06 Proceedings of the 8th workshop on Multimedia and security
Watermarking techniques using the Drawing Exchange Format (DXF) file
MM&Sec '01 Proceedings of the 2001 workshop on Multimedia and security: new challenges
Development of digital watermarking technology to protect cadastral map information
Proceedings of the 2nd International Conference on Interaction Sciences: Information Technology, Culture and Human
SSTD'07 Proceedings of the 10th international conference on Advances in spatial and temporal databases
Watermarking geographical data on spatial topological relations
Multimedia Tools and Applications
Watermarking road maps against crop and merge attacks
Proceedings of the first ACM workshop on Information hiding and multimedia security
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Abstract: This paper presents algorithms of the watermark insertion and extraction on the vector image. Most parts of the vector image consist of the array of the coordinate values. At first, the image is partitioned into the blocks with the same area and every vertex coordinate value within a block is changed to a new coordinate value whose origin is at the south-west vertex of the mask belonging to the associated block. According to the value of watermark, the insertion area is different. Unlike the work by Sakamoto et al., we are able to use an arbitrary size of the square mask. The mask of the Sakamoto et al's work is restrictive since the length of the mask is 2R -1 where R=1,2,....,n. We also show that our method is superior to the previous work against the noise attack.