Method for determining at least one geometric/physiognomic parameter associated with the mounting of an ophthalmic lens in a spectacle frame worn by a user
US9116365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2011 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Feb 5, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/6803
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Method includes: (a) placing on a user's head an accessory including at least one brightness calibration element having at least two contrasted zones; (b) capturing an image of the user's head with the accessory thereon with a device; (c) determining the position of the image of the brightness calibration element of the accessory on the captured image; (d) determining a measured value of the brightness of one part of the image of the brightness calibration element or of the image located close to the brightness calibration element; (e) modifying a parameter for adjusting the optical image-acquisition conditions of the device as a function of the measured value to improve the contrast of the image of contrasted zones of the calibration element; (f) capturing another image with the modified parameter for adjusting the optical acquisition conditions; and (g) determining the required geometric/physiognomic mounting parameter on the basis of the other image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.