Design Of Finger Multimodal Anti-counterfeiting System Based On OCT And OMAG

With the rapid development of social information,information security and personal safety have become the focus of attention of the society.Personal identity authentication technology has been widely used in terms of national and financial security,as well as personal life and consumption.Most of the identity authentication in the market is done by collecting biometrics on the finger.However,the traditional finger biometrics have the problems of single mode and weak anti-counterfeiting ability.It is more and more common and easy to deceive the fingerprint collection system by using artificially manufactured fake fingerprints.After conducting related research on optical coherence tomography(OCT)and optical micro-angiography(OMAG).Aiming at the shortcomings of modal singleness and insufficient anti-counterfeiting ability when using finger biometrics for identification,a multi-modal anti-counterfeiting system based on OCT and OMAG is proposed and designed.The main work and achievements of this paper are summarized as follows:(1)Design of synchronous multi-modal feature acquisition system for fingers: through the analysis of the demand for anti-counterfeiting systems,facing the problem of multi-modal feature acquisition and synchronous acquisition of fingers,the self-designed finger multi-modal feature synchronous acquisition system is designed independently.It includes the OCT optical platform and the total reflection skin fingerprint acquisition module.The finger skin fingerprint,the leather fingerprint and the subcutaneous blood flow information were collected synchronously.(2)Estimation of liquid flow velocity range based on OMAG: For the information of subcutaneous blood flow of fingertips obtained by OMAG method,only the flow of blood vessel tissue can not be accurately obtained,and the problem of flow information in blood vessels can not be accurately obtained.The analysis of the OMAG and the offset method OMAG deduces the calculation formula of the speed range of OMAG and ultrahigh sensitivity optical micro-angiography(UHS-OMAG),and establishes the relationship between the detectable speed and the system parameters.A method of measuring liquid flow rate information based on the OMAG and UHS-OMAG methods is provided.(3)Debugging and anti-counterfeiting experiment of finger multi-modal feature anti-counterfeiting system: According to the completed finger multi-modal feature synchronous acquisition system,the finger multi-modal feature information is collected.The data of multiple sets of real fingers and fake finger products were collected,and the biological characteristics such as skin fingerprint,dermis fingerprint and subcutaneous blood flow information were obtained and compared.The validity and security of the proposed fingerprint anti-counterfeiting system are verified...