The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2017
Filed:
Feb. 09, 2012
Jiang Tian, Beijing, CN;
Wenfei Jiang, Beijing, CN;
Kangying Cai, Beijing, CN;
Thomson Licensing, Issy les moulineaux, FR;
Abstract
To reduce the entropy of occupancy codes of an octree and improve compression efficiency, the present principles provide a method and an apparatus for traversing sub-cells in a cell according to the geometrical property of 3D models. That is, a surface smoothness measure is calculated for each sub-cell and the sub-cells are traversed in a pre-determined order of surface smoothness measures. To compute the surface smoothness measure, a sub-cell is connected to neighboring cells of its parent cell to form triangles and angles. Subsequently, the triangle areas or angular measures are used to compute the surface smoothness measure. When the connectivity information is not available in the 3D model data, the present principles also provide a method and an apparatus for estimating the connectivity.