SONY SEMICONDUCTOR SOLUTIONS CORP;ソニーセミコンダクタソリューションズ株式会社
发明人:
KUGIMIYA KATSUNAO,釘宮 克尚,SATO SHUZO,佐藤 修三
申请号：
JP2018046285
公开号：
JP2019159869A
申请日:
2018.03.14
申请国别(地区):
JP
年份:
2019
代理人:
摘要：
PROBLEM TO BE SOLVED: To provide a vein authentication system capable of enhancing an authentication accuracy.SOLUTION: The vein authentication system according to an embodiment of the present disclosure includes: a light source unit that can switch between non-polarized light and polarized light in a near-infrared region having a plurality of types of polarization directions, and a plurality of types of polarization axes； a polarization sensor including an imaging device in which a polarizer having a plurality of types of polarization axes is disposed on an imaging surface and capable of receiving reflected light on the imaging surface via the polarizer； an arithmetic unit that performs predetermined arithmetic processing based on an imaging signal； and an authentication unit that performs vein authentication using the imaging signal that has been subjected to arithmetic processing. The arithmetic unit performs a process of obtaining normal information of an authentication target by performing arithmetic processing based on a first imaging signal for reflected light obtained from the non-polarized light, and performing arithmetic processing based on a second imaging signal for reflected light obtained from polarized light in the near-infrared region to subtract a scattered light component from the second imaging signal. The authentication unit performs vein authentication using the normal information of the authentication target object and the second imaging signal subjected to the subtraction.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】認証精度を向上させることが可能な静脈認証システム等を提供する。【解決手段】本開示の一実施の形態に係る静脈認証システムは、無偏光光と複数種類の偏光方向を有する近赤外領域の偏光光とを切り替えて照射可能な光源部と、複数種類の偏光軸を有する偏光子が撮像面上に配置された撮像素子を含んで構成され、反射光を偏光子を介して撮像面上に受光可能な偏光センサと、撮像信号に基づいて所定の演算処理を行う演算部と、演算処理が行われた撮像信号を利用して静脈認証を行う認証部とを備えたものである。演算部は、無偏光光から得られる反射光についての第１の撮像信号に基づいて演算処理を行うことにより、認証対象物の法線情報を取得すると共に、近赤外領域の偏光光から得られる反射光についての第２の撮像信号に基づいて演算処理を行うことにより、第２の撮像信号から散乱光成分を差し引く処理を行う。認証部は、認証対象物の法線情報と差し引く処理が行われた第２の撮像信号とを利用して、静脈認証を
