Efficient compression of 3D models based on octree decomposition

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United States of America Patent

PATENT NO 9633473
APP PUB NO 20150103073A1
SERIAL NO

14372922

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Abstract

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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.

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Patent Owner(s)

  • THOMSON LICENSING

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cai, Kangying Beijing, CN 60 311
Jiang, Wenfei Beijing, CN 32 225
Tian, Jiang Beijing, CN 27 171

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