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Engineering three-dimensional model LOD output method based on 3D Tiles

A 3D model and output method technology, applied in 3D image processing, image data processing, instruments, etc., to achieve the effect of reducing rendering load, reducing geometric complexity, and accelerating rendering

Pending Publication Date: 2020-12-11
CHINA PETROLEUM ENG & CONSTR +2
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  • Claims
  • Application Information

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Problems solved by technology

The 3DTiles specification and LOD technology can effectively solve the problem of large data volume and complex engineering design model rendering and roaming on light terminals, providing an important technical basis for the realization of digital factories

Method used

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  • Engineering three-dimensional model LOD output method based on 3D Tiles
  • Engineering three-dimensional model LOD output method based on 3D Tiles
  • Engineering three-dimensional model LOD output method based on 3D Tiles

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Embodiment Construction

[0032] In order to understand the technical features, objects and effects of the present invention, specific embodiments of the present invention are described. It will be appreciated that the specific embodiments described herein are intended to be utilized herein, i.e., the embodiments described herein, that is, the embodiments of the invention, not all of the embodiments of the invention. Based on the embodiments of the present invention, those skilled in the art will belong to the scope of the present invention without making creative labor.

[0033] The present invention introduces graphics research, film industry, and techniques of the game industry to three-dimensional geospatial, 3DTILES defines a spatial data structure and designs a series of tile data formats for 3D content, and streaming and rendering data. Optimize. The tile data format of the three-dimensional model is designed based on the famous graphical language exchange format GLTF (GL Transmission Format).

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Abstract

The invention relates to the technical field of image data processing, and discloses an engineering three-dimensional model LOD output method based on 3DTiles, and the method builds a multi-resolutionhierarchical structure for an engineering three-dimensional model based on the HLOD technology for output, and reduces the geometric complexity of a model needing to be displayed under a specific view on the premise that the visual effect is not affected, wherein the establishment of the multi-resolution hierarchical structure for the engineering three-dimensional model comprises the steps of field composition design of tree nodes, tree node coding based on Morton codes, data segmentation, HLOD hierarchical structure establishment based on MeshID and geometric error calculation based on Hausdorff distance. According to the invention, a multi-resolution hierarchical structure is established for the engineering three-dimensional model based on the HLOD technology for output, the geometric complexity of the model in a specific scene can be reduced, and the method has great significance in rendering large-scale and complex scenes.

Description

Technical field [0001] The present invention relates to the field of image data processing, and more particularly to a 3D TILES-based engineering three-dimensional model LOD output method. Background technique [0002] 3D Tiles is an open data specification that can be used in streaming large-scale heterogeneous 3D geospatial data sets. To extend the terrain and image stream of Cesium, 3D Tiles will be used for streaming three-dimensional content, including photogrammetry models, architectural models, entity models, point clouds, and vector data. Cesium is a three-dimensional visualization platform with a vision of digital globes to connect world geospatial. [0003] 3D TILES's main purpose is to improve streaming and rendering performance of large-scale heterogeneous data sets. 3D Tiles Basis is a spatial data structure that supports multi-resolution detail hierarchy (HLOD), so there are only those scenarios visible in a given three-dimensional view to be transmitted and rendere...

Claims

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Application Information

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IPC IPC(8): G06T19/20G06T15/10
CPCG06T19/20G06T15/10
Inventor 陈渝胡耀义王鸿捷秦锋安源李佳马艳琳马先严紫含黄凯捷邓臣何向勇马超
Owner CHINA PETROLEUM ENG & CONSTR
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