High-capacity reversible watermarking for 2D vector data

This paper describes an efficient and high-capacity reversible 2-D vector data embedding method, which provides a promising solution to GIS (geographic information system) data hiding and authentication applications with a high requirement of fidelity or bit-by-bit exactness of the original 2-D vector data (point coordinates). All proposed methods are performed in the DCT-domain. For the realization of this task a bit-shift scheme is applied and a distortion limited scheme is used to guarantee a maximal deviation between the original map and the modified one. To achieve more capacity we combine the bit-shifting scheme with our former one which makes use of the strong correlation between geographic data.

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