Design system for designing shapes of eyeglasses

Details Design system for designing shapes of eyeglasses Design system for designing shapes of eyeglasses

1994-09-27

1996-11-19

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

33200, 33507, G02C 1300, A61B 310, G01B 100

Patent

active

055767788

ABSTRACT:
A design system for designing shapes of eyeglasses. In the system, image data expressing the face of a person are first subjected to image processing such as color compensation and profile emphasis. Subsequently, feature points representing the facial features of the face are extracted, and a plurality of horizontal, vertical and inclined auxiliary lines and auxiliary points on the auxiliary lines are set based on the feature points. Anchor points of a Bezier curve which defines the shapes of the lenses and frame of the eyeglasses are then determined. The Bezier curve is converted to data composed of polar coordinates, and the converted data are transmitted to machine tools. Control points provided at the anchor points are controlled based on words which represent a desired design image for the eyeglasses. The design system can automatically generates the shapes of the lenses and frames of eyeglasses based on features of individuals and their design preferences.

REFERENCES:
patent: 4817024 (1989-03-01), Saigoh
patent: 5175941 (1993-01-01), Ziegler et al.

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