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

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...

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

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