Standardization processing method based on three-dimensional head and face curved surface modeling

Abstract

The invention relates to a standardized processing method which is based on three-dimensional head face surface modeling, the steps comprise a CT or MRI-based DICOM image measurement method, a modeling method which is based on stratified 12-order Fourier series fitting under a cylindrical coordinate with the forward pole point, a normalization algorithm which has continuity of the measurement method and the modeling method and is based on face feature points and a standardized processing method of the distribution of head size scale factors and head height length index-head width length index two-dimensional distributed head face three-dimensional surface. The standardized processing method of the invention overcomes that the general non-contact measurement methods are affected by hair and shaking when in measurement of head, overcomes the shortcomings of the general three-dimensional head modeling methods on parameter control, precision and face feature reflection aspects and proposes the head face three-dimensional surface standardized processing method.

Description

technical field [0001] The invention relates to a standardized processing method for curved surfaces of the head and face, in particular to a standardized processing method based on modeling of three-dimensional curved surfaces of the head and face. Background technique [0002] At present, the known optical non-contact measurement method cannot avoid the influence of hair and the shaking of the head during the measurement process, and the amount of data is huge, and the data is generally not structured, so it is not suitable for modeling and analysis of three-dimensional head shape and normalization across multiple headtypes. [0003] In addition, the known three-dimensional surface modeling methods of the human body generally use spherical harmonic function series, super quadratic ellipsoid, B-spline surface, finite element, conic surface of rotation, etc. to parameterize and fit the limbs, while fitting the head shape The effect is not ideal, either there are too many co...

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Problems solved by technology

[0002] At present, the known optical non-contact measurement method cannot avoid the influence of hair and the shaking of the head during the measurement process, and the amount of data is huge, and the data is generally not structured, so it is not suitable for modeling and analysis of three-dimensional head shape and normalization between multiple headforms

[0003] In addition, the known three-dimensional surface modeling methods of the human body generally use spherical harmonic function series, super quadratic ellipsoid, B-spline surface, finite element, conic surface of rotation, etc. to parameterize and fit the limbs, while fitting the head shape The effect is not ideal, either there are too many control parameters, or the implicit surface is too complex, or the accuracy is poor, and more importantly, its modeling theory fails to take into account the facial features, and its parameters are in multiple heads. After standardization between the head types, the facial features of the standard head type will be seriously lost

[0004] Due to the limitations of the theoretical flaws in 3D head shape modeling, the known head and face size standards (GB / T2428) all use one-dimensional data such as head circumference and head length for standardized processing, and there is no one based on 3D head and face surface modeling. Standardized processing method

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