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In the recent years internet technologies has become the backbone of any business organization. These organizations use this facility to improve their efficiency by transferring data from one location to another. But, there are number of threats in transferring critical organizational data as any culprit employee may public this data. This problem is known as data leakage problem. In the proposed...
Copyright protection of 3-D objects are also important for protecting author rights in animation, multimedia, computer aided design (CAD), virtual reality, medical imaging etc. Especially in the grown up market of video-games, there is demand for a watermarking technique for 3-D-objects. In this paper, we propose a robust watermarking algorithm having less perceivable distortion for 3-D polygon mesh...
In the proposed watermarking scheme, watermark is embedded by re-positioning some selected vertices. The selection of vertices for watermark embedding is based on the IEEE754 floating point representation of vertex normal of selected vertices. The selected vertices are re-positioned by displacing ? component of (?,T,ø) spherical coordinate of vertices. The watermark information is embedded uniformly...
In the proposed watermarking scheme, watermark is embedded by re-positioning some selected vertices. The selection of vertices for watermark embedding is based on the secure code obtained from a secure image and cryptographic hash function(MD5). Watermarking by re-positioning is attained by restricting the vertex re-positions only by changing ρ component of (ρ,θ,ϕ) spherical coordinate of vertices...
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