Device for use in identifying or authenticating a subject

Patent metadata

Field	Value
Publication number	US-10142606-B2
Application number	US-201514863785-A
Country	US
Kind code	B2
Filing date	Sep 24, 2015
Priority date	Sep 26, 2014
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A device for use in identifying or authenticating a subject positioned in an acquisition volume on the basis of at least one biometric characteristic of the subject, the device including in succession, in offset manner along a camera placement axis: a first camera; a second camera; and a third camera; the optical axes of the first and second cameras forming between them an angle strictly less than 10°, and the optical axis of the third camera intersecting the optical axes of the first and second cameras, the optical axes of the first and second cameras each forming an angle less than or equal to 5° relative to a normal axis perpendicular to the camera placement axis.

First claim

The invention claimed is:

1. A device for use in identifying or authenticating a subject positioned in an acquisition volume on the basis of at least one biometric characteristic of the subject, the device comprising in succession, in offset manner along a camera placement axis:
a first camera;
a second camera; and
a third camera, optical axes of the first and second cameras forming between them an angle strictly less than 10°, and an optical axis of the third camera intersecting the optical axes of the first and second cameras,
the optical axes of the first and second cameras each forming an angle less than or equal to 5° relative to a normal axis perpendicular to the camera placement axis, and
superposition of fields of the first and second cameras covering the entire acquisition volume, wherein the following conditions are satisfied:
angle α 23 formed between the optical axis of the third camera and the normal axis perpendicular to the placement axis of the cameras is such that:
(arctan( h′ 23 /d )−β 23 /2)≤α 23 ≤1.1×(arctan( h′ 23 /d )−β 23 /2), and

a field angle β 23 along a height of the third camera satisfies the following condition:
β 23 ≥2×(α 23 +arctan(( h v −h′ 23 )/ d )),

where h′ 23 designates the height of the third camera measured relative to a height of bottom boundary of the acquisition volume, h v designates a height of the acquisition volume, and d designates a distance measured along the normal axis between the third camera and the acquisition volume.

2. The device according to claim 1 , wherein the optical axes of the first and second cameras are substantially parallel to each other.

3. The device according to claim 2 , wherein the optical axes of the first and second cameras are both parallel to the normal axis.

4. The device according to claim 1 , further comprising, in addition to the first, second, and third cameras, an incorporated iris image taking system in communication with an iris recognition system, said iris recognition system being configured to recognize at least one iris of the eyes of the subject from at least one image of one or both of the irises of the eyes of the subject as taken by the iris image taking system.

5. The device according to claim 4 , wherein the iris image taking system is a system for taking an image of a portion of the texture of at least one iris.

6. The device according to claim 1 , wherein:
the first camera is placed at a first height h 21 ;
the second camera is placed at a second height h 22 higher than the first height h 21 ; and
the third camera is placed at a third height h 23 higher than the second height h 22 .

7. The device according to claim 6 , wherein the optical axis of the third camera extends towards a positioning surface on which the subject is to be present in order to perform identification or authentication, and the optical axes of the first and second cameras are both parallel to the normal axis.

8. The device according to claim 6 , therein the optical axis of the third camera and at least one of the optical axes of the first and second cameras extend towards a positioning surface on which the subject is to be present in order to perform identification or authentication.

9. An automatic door fitted with the device according to claim 1 .

Assignees

• Morpho

Inventors

• Rouh Alain
• Malrat Benoit

Classifications

• G06V10/147

  Details of sensors, e.g. sensor lenses (fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19) · CPC title

• G06K9/00255

  Physics · mapped topic

• H04N7/186

  Video door telephones · CPC title

• A61B5/117

  Identification of persons (methods or arrangements for recognising patterns, e.g. fingerprints, G06F18/00, G06V40/00; identification of persons by analysing their voice or speech G10L17/00) · CPC title

• H04N5/00

  Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) · CPC title