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A Method for Interactively Segmenting Triangular Mesh Model of Full Jaw Teeth

A triangular grid and interactive technology, applied in image analysis, image enhancement, instruments, etc., can solve problems such as difficulty in separating teeth and inability to fully identify them correctly, and achieve the effect of improving accuracy and segmentation efficiency

Active Publication Date: 2019-03-19
QINGDAO LANXIN MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But because the shape and arrangement of the teeth vary from person to person, it is difficult to separate the teeth precisely
The existing segmentation algorithm only relies on the average curvature and curvature variance in identifying the gum line, etc., and cannot fully identify the correct

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Below in conjunction with embodiment, method of the present invention is described in further detail:

[0019] To segment the full-jaw tooth model, it is necessary to determine a dividing line, which can be a set of triangular edges or a set of triangular faces. This method uses a set of triangular faces.

[0020] A method for interactively segmenting a triangular mesh model of full jaw teeth, characterized in that it comprises the following steps:

[0021] (1) Manually determine a triangle on the tooth-gingiva dividing line as the starting point of the dividing line, mark the triangle as x, then manually select any segment on the tooth-gingiva dividing line, and calculate the area of ​​all triangles in this segment and the average value avg(maxL / minL) of the ratio of the longest side maxL to the shortest side minL; here, manually calibrate the starting point of the division line to be obtained and manually select any segment on the tooth-gingiva boundary line, in the a...

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Abstract

The invention relates to the technical field of three-dimensional image processing, and especially relates to a method for the interactive segmentation of a full-jaw tooth triangular network model. According to the invention, a segmentation line of tooth gingiva is selected through combining various types of model data. Moreover, the method accords with a modular idea, does not carry out any smoothening or subdividing of a decomposition result, can guarantee that a segmented model accords with actual teeth to maximum degree, is assisted manually, and can improves the accuracy and efficiency.

Description

technical field [0001] The invention relates to the technical field of three-dimensional image processing, in particular to a method for interactively segmenting a triangular mesh model of full-jaw teeth. Background technique [0002] In recent years, digital oral technology has developed rapidly, and invisible orthodontics have gradually become popular. The job to be done by the digital treatment assistant system is to establish a tooth model and provide data support for the design of the treatment plan. To establish an accurate tooth model, it is first necessary to scan the plaster model through optical methods to obtain three-dimensional data of the teeth and jaws, and then use digital geometry processing technology to separate the data of the teeth and gums, and repair the missing parts of the teeth to establish a movable tooth model for the doctor to determine Corrective program. [0003] But because the shape and arrangement of the teeth vary from person to person, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/11
CPCG06T7/0012G06T2207/30036
Inventor 于宏宝刘继敏王凯
Owner QINGDAO LANXIN MEDICAL TECH CO LTD