A Method of Automatically Segmenting Triangular Mesh Model of Full Jaw Teeth

A triangular grid and automatic segmentation technology, applied in 3D modeling, image data processing, instruments, etc., can solve the problems of method accuracy dependence, low efficiency, and complicated interaction, so as to improve accuracy and work efficiency, and avoid human error. Machine interaction process, easy post-processing effect

Active Publication Date: 2017-08-15
HANGZHOU MEIQI TECH CO LTD
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Problems solved by technology

Although Liao et al. segmented all teeth at once using a consistent harmonic field, the accuracy of the method still relies on human interaction
[0006] In short, the existing methods of segmenting the tooth triangular mesh model from the dental triangular mesh model have various defects in the application, mainly manifested in low precision, low efficiency and complicated interaction

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  • A Method of Automatically Segmenting Triangular Mesh Model of Full Jaw Teeth
  • A Method of Automatically Segmenting Triangular Mesh Model of Full Jaw Teeth
  • A Method of Automatically Segmenting Triangular Mesh Model of Full Jaw Teeth

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Embodiment Construction

[0054] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The implementation of the present invention is to further illustrate the present invention, rather than to limit the scope of the present invention.

[0055] The embodiment of the inventive method and concrete process thereof are as follows:

[0056] Import the dental triangular mesh model, such as figure 1 As shown, the model contains a total of 97,502 vertices and 195,000 triangles.

[0057] 1) Obtain the average curvature K of each mesh vertex P from the curvature value of each vertex in the dental and jaw triangular mesh model m and mean square deviation curvature K s ; The average curvature distribution is as figure 2 As shown, the mean square error curvature distribution is as image 3 shown. Wherein, the color grayscale reflects the magnitude of the curvature value, and the higher the color grayscale, the smaller the curva...

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Abstract

The invention discloses a method for automatically segmenting a triangular mesh model of full-jaw teeth. Find the average curvature and mean square deviation curvature of each mesh vertex; obtain boundary feature points and boundary feature areas; separate the dental triangular mesh model into multiple independent mesh areas and distinguish them; mark the gingival area with different numbers and the tooth area; use the region growth calculation method to obtain accurate segmentation results; sort the teeth according to the geodesic distance from other teeth to the last molar and incisor sequentially; remove burrs, delete everted patches, and use laplacian smoothing method After processing, the narrow and long triangle faces are removed to realize the segmentation of the final dental and jaw triangular mesh model. The present invention utilizes the curvature distribution of the triangular mesh model to preliminarily segment the tooth model; utilizes the region growing method to precisely cut the tooth model; smoothes the rough boundary and valgus phenomenon; achieves rapid and automatic tooth segmentation Purpose, precise and smooth segmentation.

Description

technical field [0001] The present invention relates to the grid segmentation technology in the field of digital geometry processing, in particular to a method for automatically segmenting the triangular mesh model of full-jaw teeth, which is suitable for quickly and automatically segmenting the tooth triangular mesh surface from the dental triangular mesh surface . 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 establ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/20
Inventor 田宇佳宣梦洁王春蝶
Owner HANGZHOU MEIQI TECH CO LTD
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