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Ear skin surface area calculation method and system based on ear three-dimensional model

A technology of three-dimensional models and calculation methods, applied in calculation, image analysis, image enhancement, etc., can solve problems such as high probability of error, inability to divide the area into triangles, and affecting the results of surface area calculations

Pending Publication Date: 2020-10-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the ear is relatively complex, and the operation is difficult during the treatment process.
[0004] The inventor found that when constructing a triangulation network, some areas may not be divided into triangles, which affects the result of surface area calculation
When extracting the coordinates of the vertices in the triangulation, the coordinates of the vertices of the triangle may be extracted repeatedly, which will cause errors when calculating the surface area of ​​the triangulation. Complexity, the accuracy of the data is very important

Method used

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  • Ear skin surface area calculation method and system based on ear three-dimensional model
  • Ear skin surface area calculation method and system based on ear three-dimensional model
  • Ear skin surface area calculation method and system based on ear three-dimensional model

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Embodiment 1

[0035] As the existing method introduced in the background art has a large amount of calculation, the possibility of error is high. In view of the above problems, the right ear is taken as an example below. The method for calculating the ear skin surface area based on the three-dimensional model of the ear provided by this embodiment includes the following steps, such as figure 1 Shown:

[0036] S101: Carry out vertical segmentation and horizontal segmentation on the three-dimensional ear model, respectively, and correspondingly extract horizontal slices and vertical slices.

[0037] Specifically, the three-dimensional ear model is segmented vertically and horizontally according to preset sampling intervals.

[0038] For example:

[0039] Carry out longitudinal segmentation on the 3D model of the ear, set the segmentation distance as Y 1 , divide the 3D model of the ear into sheet-like transverse slices, which are transverse slices, and the height of the transverse slices i...

Embodiment 2

[0070] The present embodiment provides the ear skin surface area calculation system based on the three-dimensional ear model, which includes:

[0071] (1) A model cutting module, which is used to segment the three-dimensional ear model vertically and horizontally, and extract horizontal slices and vertical slices correspondingly.

[0072] For example: according to the preset sampling interval, the three-dimensional ear model is segmented vertically and horizontally, and horizontal slices and vertical slices are extracted correspondingly.

[0073] (2) Segmentation of the first surface area calculation module, which is used to respectively locate the edge coordinates of each transverse slice and longitudinal slice under the pre-built coordinate system, calculate and accumulate the section area, and obtain the first surface area of ​​longitudinal segmentation and the first surface area of ​​transverse cutting surface area.

[0074] Wherein, the first surface area of ​​the longit...

Embodiment 3

[0086] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the method for calculating the ear skin surface area based on the three-dimensional ear model as described in Embodiment 1 are implemented.

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Abstract

The invention provides an ear skin surface area calculation method and system based on an ear three-dimensional model. The ear skin surface area calculation method comprises the following steps: respectively carrying out longitudinal segmentation and transverse segmentation on an ear three-dimensional model according to a preset sampling interval, and extracting a transverse slice and a longitudinal slice; respectively positioning edge coordinates of each transverse slice and each longitudinal slice, and calculating a longitudinal segmentation first surface area and a transverse segmentation first surface area; extracting a coordinate dense region of which the coordinate distribution of the known surface area is not less than a preset dense degree; reducing the sampling interval to respectively perform longitudinal cutting and transverse cutting on the coordinate dense area to obtain a longitudinal cutting calculation surface area and a transverse cutting calculation surface area of the coordinate dense area; accumulating the longitudinal / transverse cutting calculation surface area of the coordinate dense area after the coordinate dense area is removed according to the longitudinal / transverse segmentation first surface area to obtain a longitudinal / transverse segmentation ear calculation surface area; and calculating the mean value of the longitudinal segmentation ear calculation surface area and the transverse segmentation ear surface area to obtain the ear skin surface area.

Description

technical field [0001] The invention belongs to the field of ear skin surface area calculation, in particular to a method and system for ear skin surface area calculation based on a three-dimensional ear model. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In the prior art, methods for calculating irregular 3D models are matrix point cloud calculation, laser projection calculation, etc. The surface of the object is divided into small triangular areas, which are connected into a triangular network, and the surface area of ​​the object is the area of ​​the triangular network. The surface area of ​​the ear is an important indicator when performing ear deformity correction. However, the structure of the ear is relatively complex, and the operation is difficult during the treatment process. [0004] The inventors found that some areas may n...

Claims

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Application Information

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IPC IPC(8): G06T7/62G06T7/10
CPCG06T7/62G06T7/10G06T2207/30088Y02T90/00
Inventor 李玮薛峰赵宇航雷晟暄安纲马志祥孟祥伟张婉钰孟真孔祥虹燕群谢龙悦
Owner SHANDONG UNIV
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