Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Mesh Model Region Division Method for Denture Digital Restoration

An area division method and grid model technology, applied in the field of denture digitization, can solve the problems that the division fails to achieve the expected effect, the nested topology relationship of the entity model cannot be established, and the intersection relationship of the entity model is unclear, etc. Effect

Active Publication Date: 2021-01-26
FOSHAN NUOWEI TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The area division in the method in the prior art also involves the establishment of the nested topological relationship of the intersecting entity model, and the area division of the intersecting triangle is processed according to this topological relationship. In fact, in many cases, it is known that the intersection on the model lines, but the intersection relationship of the entity model is not clear, and the nested topology relationship of the entity model cannot be established, which limits the application range of the algorithm in disguise.
There is another method, but it can only be applied to the case where there is one intersection line on the model, and the model is divided into two with the intersection line as the boundary; when there are multiple intersection lines, the division cannot achieve the expected effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Mesh Model Region Division Method for Denture Digital Restoration
  • A Mesh Model Region Division Method for Denture Digital Restoration
  • A Mesh Model Region Division Method for Denture Digital Restoration

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0097]S1. The points on the current intersection line of the tooth model are stored in the array Line. Line represents the current intersection line. Calculate the number of vertices in the Line n: n=Line.size(),

[0098]Define i as the id number of the current vertex of the line of intersection, that is, Line[i] represents the current i-th vertex of the line of intersection, and i∈[0,n);

[0099]S2, take three discrete points V1, V2, and V3 of the intersection line:

[0100]V1=Line[0];

[0101]V2=Line[n / 3];

[0102]V3=Line[2*n / 3];

[0103]S3. Calculate the normal vectors dir1 and dir2, and perform cross multiplication to obtain the direction dir_axis of the vertical line of the plane formed by V1, V2, and V3. This direction is approximated as the direction of the vertical line of the intersection;

[0104]dir1=V2-V1;

[0105]dir2=V3-V2;

[0106]dir_axis=dir1X dir2;

[0107]S4. Calculate the center point coordinate O1 of the tooth model, the center point O2 of the current intersection line, and the direction vec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a mesh model area division method for denture digital restoration, including adjusting the direction of all intersection lines in the tooth model according to a preset positive direction; calculating the enclosing area of ​​each intersection line; Computational processing is performed on each encircled area, and the divided area is obtained and output. The present invention effectively solves the problem of division of multiple regions of the model, and can quickly and accurately divide the model into mutually independent regions when there are multiple intersection lines on the surface of the model, and does not need to care about the nesting relationship of model entities. As long as the intersection line of a model is determined, the area can be divided, which greatly improves the scope of application, and gets rid of the limitation that the area can only be divided according to one intersection line. The invention can be widely applied in the technical field of dentures.

Description

Technical field[0001]The invention relates to the technical field of denture digitization, in particular to a method for dividing a grid model area for denture digitization restoration.Background technique[0002]In the denture restoration system, it is often necessary to edit the tooth model, such as deforming a part of the area, or deleting a part of the area. To edit an area on the model, you must first request the area. The area is obtained by dividing the model surface by the intersection line: the model can be divided into two areas according to an intersection line, and when there are n intersection lines on the model, the model will be divided into n+1 Regions. Dividing the model area according to the intersection requires that each area after the division is self-contained, and will not include another area, nor will it be included by another area. In the actual algorithm operation such as the fusion process of the denture bridge model, the tooth model and the connector model...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/30G16H50/50
CPCG06T17/30G06T2210/41
Inventor 王煜马季仁夏鸿建马杰林泽锋
Owner FOSHAN NUOWEI TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com