Scanning type automatic zooming iris image gathering system and gathering method thereof

A technology of iris image and automatic zooming, which is applied in character and pattern recognition, medical science, instruments, etc., and can solve problems such as high cost, complex structure, and long acquisition time

Inactive Publication Date: 2008-02-06
UNIV OF SCI & TECH OF CHINA
View PDF0 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem of the present invention is to provide a scanning automatic zoom iris image acquisition system and acquisition method to overcome the defects of the existing variable focal length iris acquisition device with complex structure, high cost and sometimes too long acquisition time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Scanning type automatic zooming iris image gathering system and gathering method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] As shown in Figure 1, the present invention is the optical part of acquisition system by light source 3, cold mirror 2, variable focus optical lens group 4 and camera head 6; Cold mirror 2, variable focus optical lens group 4 and camera head 6 are connected successively, and they The central axis of the center axis is located on the same straight line; the light source 3 is located around the cold mirror 2, and can be one or more light sources, which are used to illuminate the eyes of the person being collected; the light source 3 is used to illuminate the iris of the user. The near-infrared light source is generally a semiconductor light-emitting diode or a halogen lamp, etc.; the cold mirror 2 reflects visible light with a wavelength of about 400nm to 700nm, and transmits near-infrared light with a wavelength of about 700nm to 900nm. The computer-controlled near-infrared light source only emits light when collecting iris images , to save power consumption and prolong t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a scan type automatic zooming iris image acquisition system and acquisition method, wherein the acquisition system comprises an image acquisition unit and a control unit; the image acquisition unit comprises a camera, a chilled mirror, a light source, a focus-variable optical lens set and an image acquisition card; the control unit comprises a light source control circuit, a zooming motor control circuit, a zooming motor and a computer; the chilled mirror, the focus-variable optical lens set and the chilled mirror are connected together in turn with the central axial lines being at one straight line; the light source which is positioned around the chilled mirror is used to illuminate the eyes of acquisition object; the zooming motor which is connected with the focus-variable optical lens set is used to regulate the imaging distance of the focus-variable optical lens set to move between farthest and nearest positions; the image acquisition card is used to receive images collected by the camera and to transmit the images to the computer; the computer controls switch on/off of the light source through the light source control circuit; the zooming motor control circuit connects the zooming motor and the computer, while the computer controls the zooming motor control circuit to make the zooming motor rotate. The invention has the advantages of a simple structure, low cost and short acquisition time.

Description

technical field [0001] The invention belongs to the technical field of biological feature identification and security authentication, in particular to a non-contact scanning automatic zoom iris image acquisition system and acquisition method. Background technique [0002] Biometrics is an emerging research discipline that uses various physiological and morphological characteristics inherent in the human body as the identification medium to uniquely identify individuals and conduct personal identity authentication. Compared with traditional identification methods, identification technology based on biometric identification has the advantages of not being easily forgotten or lost, good anti-counterfeiting performance, and portable. [0003] Iris recognition is one of the most important research contents in biometric recognition. Compared with biological characteristics such as fingerprints and faces, iris has the advantages of natural protection, uniqueness, high stability an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/14A61B5/117A61B3/10G06K9/20A61B5/1171
Inventor 庄镇泉姚鹏李斌
Owner UNIV OF SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap