Automatic zoom magnification control using detection of eyelid condition
US5839000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1997 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Nov 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2213/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The apparatus is designed to adjust the zoom magnification control of a camera having a variable-magnification device, and includes a camera optical system for converting a scene into an image, a view finder for displaying said image to a user, a zoom control for changing the focal length of the lens, a detector coupled to the view finder for detecting a zoom condition of the user's face, and an analysis system for analyzing the detected zoom condition and for generating an input signal to the zoom control to change the focal length of the lens as a function of the zoom condition of the user's face. The method includes the steps of converting a scene into an image using a camera optical system; displaying the image to a user; detecting a zoom condition of the user's face with a zoom-condition detector; analyzing the detected zoom condition of the user's face; and generating an input signal to a zoom control for changing the focal length of the lens as a function of the zoom condition of the user's face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.