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Three-dimensional model multi-detail-level structure based on extension combination

A multi-level of detail, three-dimensional model technology, applied in the field of online three-dimensional commodity display, online three-dimensional city map, computer visualization, can solve the problems of weak computing and storage capacity, small wireless network bandwidth, and reduced display effect

Inactive Publication Date: 2014-07-09
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of some objective conditions, such as weak computing and storage capabilities of mobile devices, and small wireless network bandwidth, etc., it will affect the speed of 3D model processing and display, and data transmission and massive calculations require high configuration requirements. These factors lead to slow response of the device, reduced display effect, crash, etc.

Method used

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  • Three-dimensional model multi-detail-level structure based on extension combination
  • Three-dimensional model multi-detail-level structure based on extension combination
  • Three-dimensional model multi-detail-level structure based on extension combination

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0021] Step 1, first extract the center of gravity of the model in the three-dimensional scene, and generate Delaunay triangulation based on this;

[0022] Step 2, by performing semantic segmentation on the generated Delaunay triangulation, detect the adjacent relationship between the models in the 3D scene;

[0023] Step 3, calculate the spatial distance between adjacent models, and merge two adjacent models from small to large to generate a tree-shaped multi-detail hierarchy GroupTree

[0024] Step 4. During the dynamic visualization process, according to the current user viewpoint and device performance, select the corresponding node in the GroupTree for visualization.

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Abstract

Te invention discloses a three-dimensional model multi-detail-level structure based on extension combination. According to the structure, segmentation is conducted on a three-dimensional model especially a three-dimensional urban model or a three-dimensional commodity display model by means of a semantic net, and the parts of the model obtained through segmentation are grouped; a Delaunay triangulation network is generated for each group to detect the adjacent relations between models in a three-dimensional scene, the extension combination algorithm is conducted on adjacent nodes, and a multi-detail-level model GroupTree is constructed; during dynamic visualization, the detail level required is calculated by monitoring the distance between the current user viewpoint and a group and the angle between the sight and the group, and corresponding nodes in the multi-detail-level model GroupTree are loaded dynamically; in this way, dynamic comprehensive simplification of the model is achieved, and visualization efficiency is improved.

Description

1. Technical field [0001] The invention mainly relates to the field of computer visualization. By merging adjacent three-dimensional models, a GroupTree multi-detail hierarchical structure is established, so as to reduce the amount of data for reading models, simplify the perspective model, and improve the display efficiency of three-dimensional models in dynamic visualization. The invention will be mainly used in the fields of online three-dimensional city map, online three-dimensional commodity display and the like. 2. Background technology [0002] 3D model visualization technology has developed rapidly in recent years and has been applied in many fields, such as games, geographic information systems, e-commerce display and so on. It plays an important role in promoting route navigation, location query, and information display. It has broad application prospects in the field of mobile services. People can obtain the current city location through mobile terminal devices an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06T7/00G06T19/00
Inventor 曹杰毛波伍之昂王有权陶海成方昌健
Owner NANJING UNIV OF SCI & TECH
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