3D (three-dimensional) apparel grading method based on human body characteristics

Abstract

The invention relates to a 3D (three-dimensional) apparel grading method based on human body characteristics. The 3D apparel grading method comprises the steps of reading a 3D human body model; generating characteristic points and characteristic lines of the 3D human body model; calculating the size of the 3D human body model; reading a 2D (two-dimensional) apparel pattern; putting the 2D apparel pattern at the proper position on the 3D human body model to obtain the 3D spatial position of the 2D apparel pattern; calculating the relative position relationship of the boundary control points of the 2D apparel pattern and the 3D human body model; setting a grading size of the 3D human body model and calculating the grading differences; setting the grading datum points of the 2D apparel pattern; calculating the grading offsets of the boundary control points of the 2D apparel pattern, and updating the boundary shapes of the 2D apparel pattern; and adjusting the grading quantities of certain special control points according to the design requirement of the apparel pattern to obtain a final grading apparel pattern. According to the method, the design speed is fast, the efficiency is high, the degree of automation is high, the design process of the apparel is accelerated greatly and the design quality of the apparel is improved.

Description

technical field [0001] The invention relates to a clothing grading method, in particular to a three-dimensional clothing grading method based on human body characteristics. Background technique [0002] Grading is an important part of garment pattern design. It is based on a pattern of a certain size in a certain style, taking into account the relationship between various specifications or models, assigning sizes and calculating, and drawing patterns of various specifications or models design method. Traditional clothing grading is done manually, which is inefficient and error-prone. Since the application of 2D clothing CAD, the efficiency of clothing grading has been greatly improved. Computer-assisted garment pattern grading can be divided into code equalization method, point grading method, cut line grading method and automatic grading method. Although their operation methods are different, the principle is the same, that is, changing the position of the control vertex ...

AI Technical Summary

Problems solved by technology

However, there are some deficiencies in the 2D garment grading method

Mainly contain the following two points: 1) the operation is complicated

Two-dimensional grading needs to set the moving direction and moving distance of each control point on the pattern. The efficiency is relatively low, and the operation speed is relatively slow. It requires very experienced masters to operate proficiently.

In addition, there are many methods of two-dimensional grading, including code equal division method, point grading method, cut line grading method and automatic grading method, etc. Since the methods are not uniform, it is not easy for beginners to master

2) Low design precision

For common clothing styles and standard body sizes, according to some summarized rules, the two-dimensional grading method can handle it better, but for some special-shaped clothing patterns or non-standard body shapes, use the two-dimensional grading method The accuracy of the obtained paper pattern is relatively low, and multiple trials are required to obtain a suitable garment paper pattern

Because two-dimensional grading only pays attention to the change of clothing size, ignoring the requirements of human body structure, but due to the complexity of the human body and the difference in body shape, the fit of the pattern drawn by scaling the pattern through a uniform data ratio will be poor.

In terms of 3D CAD, the current 3D clothing system still focuses on 3D clothing try-on and simulation, and does not yet have the function of 3D grading

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