Foot shape parameter obtaining method based on grid model and section lines

A cross-section line and model technology, which is applied in the field of foot shape parameter acquisition based on grid models and cross-section lines, to achieve the effects of reducing errors, improving reliability, and high accuracy and precision.

Active Publication Date: 2018-09-28
HUNAN UNIV
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AI Technical Summary

Problems solved by technology

Foot shape parameters can be measured and estimated using computer-aided digital measurement software, but manual interaction is still required to determine the precise parameters. Therefore, there is an urgent need for a method that can automatically obtain accurate foot shape parameters

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  • Foot shape parameter obtaining method based on grid model and section lines
  • Foot shape parameter obtaining method based on grid model and section lines
  • Foot shape parameter obtaining method based on grid model and section lines

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Embodiment Construction

[0121] The present invention will be further described below in conjunction with examples.

[0122] In the present invention, the point cloud data of the human foot shape is firstly processed into a grid to obtain a grid model, and the grid model is cut by using the reference Z plane to obtain a section line composed of discrete points on the plane, and the area of ​​the section line is The main axis of the section line is extracted through analysis, and the local coordinate system of the grid model is established based on the main axis. Since the grid model expresses the surface shape of the human foot, five key parameters can be automatically extracted on the grid as long as the accuracy of the model is high enough. Among them such as figure 1 As shown, the grid model is a Delaunay triangular network to represent the topological relationship.

[0123] Among them, such as figure 2 As shown, the section line refers to the two-dimensional polyline formed by the discrete poi...

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Abstract

The invention discloses a foot shape parameter obtaining method based on a grid model and section lines. The method comprises the steps of S1, obtaining a point cloud model of a foot shape and forminginterconnected grids based on point clouds to obtain the grid model; S2, establishing an X-Y-Z local coordinate system of the foot shape based on the grid model; and S3, setting a search window on apreset feature section line to obtain feature points corresponding to a to-be-tested parameter, computing the to-be-tested parameter, computing the Euclidean distance between the feature points of theto-be-tested parameter when the to-be-tested parameter is foot length or foot width, taking a plane in which the feature points corresponding to the to-be-tested parameter are located as a cutting plane based on the X-Y-Z local coordinate system when the to-be-tested parameter is ball girth or instep girth or heel girth, and cutting the grid model to obtain a ball girth section line or an instepgirth section line or a heel girth section line, and then computing contour length of the ball girth section line or the instep girth section line or the heel girth section line. According to the method, the foot shape parameter can be high precisely and automatically extracted.

Description

technical field [0001] The invention belongs to the technical field of foot shape parameter measurement, in particular to a foot shape parameter acquisition method based on grid models and section lines. Background technique [0002] Feet are important parts of the human body. With the continuous improvement of living standards, people have higher and higher requirements for the comfort of shoes, and personalized shoemaking has become a trend. As a prerequisite for shoemaking, it is necessary to obtain various parameters of the feet. The traditional measurement method is to let experienced professionals use a soft tape to measure and record. Its disadvantages are as follows: (1) The efficiency is not high and manual measurement is required; (2) The accuracy of the data depends on the experience of professionals, and the data reproducibility is not good; (3) The measurement method is not flexible and requires professionals and tools auxiliary. [0003] With the popularizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 周朗明
Owner HUNAN UNIV
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