Method of measuring at least one geometrico-physiognomic parameter for positioning a vision correcting eyeglass frame on the face of a wearer
US7950800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 29, 2008 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Feb 29, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C13/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of capturing a substantially front-view image of the face of a wearer wearing at least one frame (10), the image being captured by an image-capture appliance (1), and calculating the geometrico-physiognomic parameter (H, TETA) by processing the captured image. The calculation of the geometrico-physiognomic parameter (H, TETA) includes identifying in the image the image of a predetermined remarkable point (RC) that is directly or indirectly associated with the wearer's face or with the frame, and it takes into consideration a magnitude representative of the absolute vertical angle of observation (GAMMA) formed between firstly an observation line (DO) connecting the pupil (7) of the image-capture appliance (1) to the remarkable point (RC), and secondly its projection onto a horizontal plane (PF).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.