Title:
POINT CLOUD DATA PREPROCESSING METHOD, POINT CLOUD GEOMETRY CODING METHOD AND DEVICE, AND POINT CLOUD GEOMETRY DECODING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/166957
Kind Code:
A9
Abstract:
Disclosed in the present invention are a point cloud data preprocessing method, a point cloud geometry coding method and device, and a point cloud geometry decoding method and device. The preprocessing method comprises: performing coordinate conversion on original point cloud data to obtain a representation of an original point cloud in a cylindrical coordinate system; unfolding the cylindrical coordinate system to obtain a two-dimensional structure; and regularizing the two-dimensional structure on the basis of a geometric distortion measure to obtain a regularized structure. The coding method comprises: performing predictive coding on preprocessed original point cloud data to obtain a geometric information code stream. According to the point cloud geometry coding method provided by the present invention, an original point cloud is subjected to regularization preprocessing, so that the point cloud presents regularized distribution in the horizontal and vertical directions; thus, the spatial correlation of the point cloud is better reflected, and the coding efficiency is improved.
Inventors:
YANG FUZHENG (CN)
ZHANG WEI (CN)
ZHANG WEI (CN)
Application Number:
PCT/CN2022/075379
Publication Date:
May 19, 2023
Filing Date:
February 07, 2022
Export Citation:
Assignee:
HONOR DEVICE CO LTD (CN)
International Classes:
G06T9/00
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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