Encoding method, system and medium for point cloud transmission by perspective
A coding method and transmission scheme technology, applied in the field of media presentation, can solve problems such as large amount of calculation, poor reconstruction effect, poor preservation of surface features of three-dimensional objects, etc., and achieve the effect of saving resources
Active Publication Date: 2021-10-29
SHANGHAI JIAOTONG 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 method 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 present invention provides an encoding method for point cloud sub-viewpoint transmission, which includes: point cloud segment determination step: determine the corresponding point cloud segment according to the observation view angle, and obtain a series of point cloud segments classified into corresponding view angle categories; Transmission encoding step: According to the obtained series of point cloud fragments divided into the corresponding view categories, adopt the split view transmission scheme, perform high-definition encoding and transmission for the view points that need to be observed, and compare the view points that do not need to be observed. Low-definition encoded transmission. The present invention provides a transmission strategy for adaptively adjusting the new type of point cloud media according to the user's viewing angle. It does not need to make major modifications to the current point cloud transmission strategy, and can be better combined with the current encoding algorithm with high compression rate. , without losing the quality of experience of the user's main viewing angle, while saving the resources consumed by transmission, the purpose of multi-view transmission is realized.
Description
technical field [0001] The present invention relates to the technical field of media presentation, and in particular, to a coding method, system and medium for point cloud perspective transmission. 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 can obtai...
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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 JIAOTONG UNIV