Face image processing apparatus for extraction of an eye image based on the position of the naris
US6606397B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1999 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Nov 12, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2503/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a face image processing apparatus capable of preventing the error extraction of the eye when extracted, and improving reliability in the open/close detection through a two-dimensional feature of the eye area. This face image processing apparatus comprises: a camera (2) for inputting a face image of a person to be detected (1); a multi-valued image memory (3) for temporarily storing the light and shade image obtained by the camera (2); binarization means (4) for binarizing the light and shade image outputted from the multi-valued image memory (3); a binary image memory (5) for temporarily storing the binary image obtained by the binarization means (4); feature extraction means (6A) for extracting a naris binary area from the binary image outputted from the binary image memory (5), and for extracting an eye binary area from the binary image outputted from the binary image memory (5) using the naris binary area as reference; and open/close detection means (7A) for detecting the opening/closing states of the eye based on the shape feature of the eye binary area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.