Point cloud sub-view transmission coding method and system and medium
A coding method and coding system technology, applied in the field of media presentation, can solve the problems of poor reconstruction effect, poor retention of surface features of three-dimensional objects, and large amount of calculation.
Active Publication Date: 2021-03-05
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
The present invention mainly solves the technical problems of poor preservation of surface features of three-dimensional objects, poor reconstruction effect and large amount of calculation existing in the existing methods for streamlining three-dimensional point clouds
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[0159] The three kinds of encoding schemes that realize the transmission of point clouds in different angles and in different resolutions proposed by the present invention, the specific implementation schemes are as follows:
[0160] First of all, no matter which encoding scheme is adopted, it is necessary to determine the corresponding point cloud segment according to the observation angle. It can be implemented relatively simply on the basis of the current point cloud sequence encoding method. After the step of determining the point cloud segment corresponding to the viewing angle, a series of point cloud segments classified into the corresponding viewing angle category can be obtained, which is also the premise of the three technical solutions in the point cloud perspective transmission strategy proposed in this patent with the foundation. The specific implementation algorithm is as follows.
[0161] The current classical encoding method of the point cloud sequence is to ...
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The invention provides a point cloud sub-view transmission coding method which comprises the following steps: a point cloud fragment determination step: determining a corresponding point cloud fragment according to an observation view angle, and obtaining a series of point cloud fragments divided into corresponding view angle types; and a sub-view angle transmission encoding step: according to theobtained series of point cloud fragments divided to the corresponding view angle types, adopting a sub-view angle transmission scheme to perform high-definition encoding transmission on the view angle needing to be observed, and performing low-definition encoding transmission on the view angle not needing to be observed. The invention provides a transmission strategy for self-adaptively adjustingthe novel point cloud media according to the view angle of the user, the current point cloud transmission strategy does not need to be greatly modified, the current coding algorithm with high compression rate can be better combined, the experience quality of the main view angle of the user is not lost, resources consumed by transmission are saved, and the purpose of sub-view transmission is achieved.
Description
technical field [0001] The present invention relates to the field of media presentation technology, in particular, to an encoding method, system and medium for point cloud transmission based on perspective. Background technique [0002] In recent years, with the increasing demand for immersive media experience and the rapid development of 3D scanning technology, 3D data has shown more and more important application value, including the use in machine vision, automatic navigation, cultural relics protection, scenarios such as medical diagnosis. [0003] As an emerging 3D media format, point cloud can record and describe 3D objects or 3D scenes more realistically and in detail. Point cloud data scans the surface of a three-dimensional object, records its three-dimensional coordinates, and may record attribute information associated with each coordinate, including color, reflection intensity, normal vector, etc. Modern 3D scanning technology is developing rapidly, and people ...
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Login to View More IPC IPC(8): H04N13/161H04N13/194H04N13/122H04N13/363H04N13/366
CPCH04N13/122H04N13/161H04N13/194H04N13/363H04N13/366
Inventor 徐异凌徐英展朱文婕管云峰柳宁
Owner SHANGHAI JIAO TONG UNIV