| 摘要 |
The invention relates to a method for watermarking a three-dimensional object. The three-dimensional object is represented by a mesh. A mesh comprises a plurality of vertices. The method further comprises determining an original histogram of distances for said mesh, wherein a distance is computed between a barycenter of said mesh and a vertex of said mesh; modifying positions of a plurality of vertices of the mesh such that an histogram of distances for said modified mesh reaches a target histogram, said target histogram being a function of a watermark payload and of the original histogram of distances wherein modifying the positions of said plurality of vertices, comprises modifying the position of at least one vertex along a direction distinct from the direction defined by said vertex to the barycenter such that a distortion constraint between said mesh and said modified mesh is satisfied and a distortion constraint between said barycenter and a barycenter of said modified mesh is satisfied. The invention further relates to a method for detecting a watermark in a three-dimensional object, to devices for implementing the methods, to a watermarked object. |
