Method for designing glasses frame based on facial three-dimensional measurement

Abstract

The invention discloses a method for designing a glasses frame based on facial three-dimensional measurement, comprising: (1), acquiring a three-dimensional grid model of a facial area and a three-dimensional facial feature point set; (2), selecting a glasses type and setting glasses generation parameters; (3), acquiring two complete lens grids composed of a plurality of rows of curves and a plurality of columns of curves; (4), acquiring two complete rim grids; (5), generating a complete nose bridge grid between the rim grids; (6), moving points, closest to the nose, from nose pads to the surface of the nose, and after iteration, updating a position of an apex of the nose pad grid to the rim grids to obtain a combined lens frame grid; (7), generating two hinge positions of a hinge and legs to finish the designing of the glasses frame. The shapes of the nose pads are optimized automatically according to the nose shape of a user, fitting degree is high, and adaptation to asymmetry of the face is achieved; the length and orientation of the legs are adjusted automatically according to positions of ears, providing comfort of wearing and rarity of sliding; manufacture cost is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of glasses design and manufacture, and in particular relates to a method for designing glasses frames based on three-dimensional measurement of human faces. Background technique [0002] Existing spectacles are mainly divided into metal spectacle frames, plastic spectacle frames and plastic-metal hybrid spectacle frames according to the frame material. The development and production process of the three kinds of mirror frames are roughly similar, including the following steps: ① Design and development: the engineering department uses 3D drawing software to draw development drawings, including three views of the frame and accessories size drawings; ② Prototype confirmation: Prototype department Make prototype samples, verify the matching dimensions between the mirror legs of the frame and accessories; ③mold development: the mold factory designs, manufactures and verifies the molds based on the prototypes and ...

AI Technical Summary

Problems solved by technology

[0003] The existing glasses manufacturing technology has the following problems: Due to the cost factor of design development and mold development, it is impossible to design special frames for different user's face shapes

Ou Jian and others from Harbin Institute of Technology proposed a method based on human biological information in the patent "An Online Digital Customization System Based on Human Biological Information" (application number CN201410086858.4) for shoes, glasses, clothes, etc. A plan for online digital customization, but the specific process and means of customization are not described in the plan, and it is not clear how to ensure the fit between the generated product and the user's digital model

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