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A tooth three-dimensional model automatic segmentation method based on curved surface parameterization

A three-dimensional model, automatic segmentation technology, applied in image data processing, instruments, etc., can solve the problems of low precision and unsatisfactory segmentation effect.

Active Publication Date: 2019-06-18
洛阳中科信息产业研究院 +1
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Problems solved by technology

[0005] In order to solve the problem of low precision and unsatisfactory segmentation effect caused by geometrically segmenting the three-dimensional tooth model in the prior art, the present invention provides a method based on surface parameterization Automatic segmentation method of tooth 3D model

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  • A tooth three-dimensional model automatic segmentation method based on curved surface parameterization
  • A tooth three-dimensional model automatic segmentation method based on curved surface parameterization
  • A tooth three-dimensional model automatic segmentation method based on curved surface parameterization

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Such as figure 1 , a method for automatic segmentation of 3D tooth models based on surface parameterization. First, based on the surface parameterization algorithm, the triangular mesh is mapped to an image, and automatic segmentation is realized at the image level, and then mapped back to the triangular mesh for edge refinement. Finally, Achieve high-precision, high-robust automatic segmentation effect.

[0036] The specific plan is as follows:

[0037] 1. Surface parameterization:

[0038] Firstly, a three-dimensional tooth model is obtained. The three-dimensional model can be regarded as a curved surface in three-dimensional space, and the three-dimensional curved surface can be mapped to a two-dimensional plane by using the surface parameterization algorithm. Surface parameterization is mathematically equivalent to solving a smooth bijection from a surfac...

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Abstract

The objective of the invention is to solve the problem of low precision caused by segmentation of a tooth three-dimensional model by a geometric method in the prior art. According to the technical scheme, the automatic tooth three-dimensional model segmentation method based on curved surface parameterization comprises the steps that after a tooth three-dimensional model is obtained, a curved surface parameterization algorithm is used for mapping a three-dimensional curved surface to a two-dimensional plane, and a tooth two-dimensional image is obtained; Next, through a U-net neural network structure, the two-dimensional image of the tooth is automatically segmented to obtain a segmentation mask of each tooth; And finally, segmentation edge refinement is carried out on the segmented tooth image based on a network flow algorithm, and finally automatic segmentation of the tooth three-dimensional model is achieved. The method can automatically segment the tooth three-dimensional model, andhas high precision and high robustness. The method has a good application effect in an orthodontic CAD system.

Description

technical field [0001] The invention relates to the field of automatic segmentation of three-dimensional tooth models, in particular to a three-dimensional tooth model automatic segmentation method including three-dimensional model surface parameterization, image segmentation, and three-dimensional model segmentation edge refinement. Background technique [0002] Orthodontics is the study of treatment methods and knowledge of malocclusion of teeth. Traditionally, a plaster model of the patient's teeth and jaws is made first, and clinicians manually analyze the plaster model and design an orthodontic surgery plan. With the development of computer technology and the improvement of 3D scanning equipment, computer-aided design (CAD) systems appear in more and more fields. It uses computers and their graphics devices to help designers efficiently complete high-intensity and repetitive work, such as complex calculations, information storage, and graphics drawing. At present, the ...

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Application Information

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IPC IPC(8): G06T19/20
Inventor 李淳芃向宇张建达
Owner 洛阳中科信息产业研究院
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