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Three-dimensional point cloud compression storage method and system based on spatio-temporal data fusion

A technology of 3D point cloud and compressed storage, which is applied in the field of GIS information to achieve the effect of improving storage efficiency and saving storage space

Active Publication Date: 2021-02-26
浙江华阳数智信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method and system are mainly aimed at the compression and storage of point cloud objects in the same area at different times

Method used

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  • Three-dimensional point cloud compression storage method and system based on spatio-temporal data fusion
  • Three-dimensional point cloud compression storage method and system based on spatio-temporal data fusion

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Experimental program
Comparison scheme
Effect test

Embodiment

[0020] This embodiment provides a 3D point cloud compression storage method based on spatio-temporal data fusion, such as figure 1 shown, including:

[0021] S1. Point cloud data matching.

[0022] This step realizes the pre-processing of the newly added 3D into the warehouse. First, convert the coordinate system of the newly added point cloud data into the coordinate system used to store the point cloud data in the database; then calculate the vertex coordinates of the smallest circumscribed cube in the three-dimensional space area of ​​the newly added point cloud, so as to facilitate subsequent matching to the specific database storage grid Central fusion storage; finally, an index table needs to be generated to record which storage grid blocks the new point cloud data will be stored in the database;

[0023] S2. Point cloud timing index.

[0024] This step implements the definition of the file header of the grid stored in the database and the version determination of the...

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PUM

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Abstract

The invention relates to a point cloud compression storage method and system, belonging to the field of GIS information technology, in particular to a three-dimensional point cloud compression storage method and system based on spatio-temporal data fusion. In the present invention, by changing the storage format of point cloud data, combined with the idea of ​​storing multi-version point cloud data in grids, the point cloud data with the same position information at different times are fused and stored in an integrated manner, thereby realizing the same area and The compressed storage of multi-version data of the same geometric object can effectively improve the storage efficiency of massive point cloud data and save storage space; at the same time, the integrated compressed storage method of 3D point cloud data can also be used for other spatiotemporal data with 3D attributes, Provide assistance and reference.

Description

technical field [0001] The invention relates to a point cloud compression storage method and system, belonging to the field of GIS information technology, in particular to a three-dimensional point cloud compression storage method and system based on spatio-temporal data fusion. Background technique [0002] Point Cloud Data is a collection of sampling points on the surface of a three-dimensional (or more than three-dimensional) geometric model, and is a set of discrete points scattered in three-dimensional space. Each point contains the three-dimensional coordinate information of the point, as well as other attribute information such as color (RGB), reflection intensity, etc., but does not contain any topological information. The point clouds are independent of each other, and can be combined into geometric models of arbitrary shapes according to the calling rules, without being constrained by the continuity of the surface. At the same time, due to the development of senso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/60
CPCG06T1/60
Inventor 张良张帆周佳雯张谦王卓琳
Owner 浙江华阳数智信息科技有限公司