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Automatic recognition algorithm for feature points of tooth models based on local coordinates

A tooth model and automatic recognition technology, applied in computing, 3D modeling, image data processing, etc., can solve the problems of lack of accuracy and poor universality, and achieve the effect of easy processing

Active Publication Date: 2018-01-09
HANGZHOU MEIQI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] 2. Lack of certain accuracy rate, not very universal

Method used

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  • Automatic recognition algorithm for feature points of tooth models based on local coordinates
  • Automatic recognition algorithm for feature points of tooth models based on local coordinates
  • Automatic recognition algorithm for feature points of tooth models based on local coordinates

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Embodiment Construction

[0091] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0092] Embodiments of the present invention and concrete process are as follows:

[0093] 1) Complete the naming of each tooth. The tooth name consists of 2 letters and 1 number. The first letter is U or L, which means upper teeth or lower teeth respectively, and the second letter is L or R, which means On the left or right side of the tooth, the third digit indicates which tooth is on one side of the tooth, input the model of the tooth and the local coordinate system, for this embodiment, such as figure 1 As shown, tooth UL1 represents the first tooth on the left side of the upper jaw, as shown.

[0094] 2) Identify the jaw point, axis point and gingival point for each tooth model

[0095] Realize the automatic identification of the first type of points (jaw point, axis point and gingival point), the recognition target is each tooth, for this embodiment, i...

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Abstract

The invention discloses an automatic recognition algorithm for feature points of tooth models based on local coordinates. The tooth models and a local coordinate system are input, a jaw point, an axispoint and a gum point of each tooth model are recognized, thee points of a sharp tooth point of a tooth model of molar and a CAC curve are recognized, and the sharp points of the tooth models of themolar, a premolar and a canine are recognized. The local coordinates are utilized to assist in automatic recognition of feature points, thereby facilitating later correction assessment and registration, and greatly reducing human errors to a certain extent while saving time.

Description

technical field [0001] The invention relates to a feature automatic recognition method of a tooth grid model, in particular to an automatic recognition algorithm of a tooth model feature point based on local coordinates. Background technique [0002] In recent years, digital oral technology has developed rapidly, and invisible orthodontics has gradually become popular. The work completed by the digital treatment assistance system is apart from establishing a tooth model to provide data support for the design of the treatment plan. Usually, in order to obtain a tooth model, it is first necessary to scan the plaster model optically to obtain the three-dimensional data of the jaw, then use digital set processing technology to segment the teeth, number the teeth to facilitate later operations, and then perform a series of operations on the digital model. [0003] The automatic selection of tooth feature points is an important part of the orthodontic system. It has a wide range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T7/33
Inventor 王启超宁楠褚玉伟宣梦洁
Owner HANGZHOU MEIQI TECH CO LTD
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