Abstract: Provided is an optical fingerprint acquisition apparatus. The fingerprint acquisition apparatus has an improved optical lens unit and can correct distortion of an image caused by a light refractor. The optical lens unit includes two cylindrical lenses disposed so that an optical axis of incident light does not coincide with a central axis of the lenses. The optical lens unit corrects an image that is distorted into a rectangle by a light refractor, thereby restoring a square shape. In particular, the fingerprint acquisition apparatus is useful in the simultaneous acquisition of multiple fingerprints as well as the acquisition of a single fingerprint.

Abstract: Provided is an optical fingerprint acquisition apparatus. The fingerprint acquisition apparatus has an improved optical lens unit and can correct distortion of an image caused by a light refractor. The optical lens unit includes two cylindrical lenses disposed so that an optical axis of incident light does not coincide with a central axis of the lenses. The optical lens unit corrects an image that is distorted into a rectangle by a light refractor, thereby restoring a square shape. In particular, the fingerprint acquisition apparatus is useful in the simultaneous acquisition of multiple fingerprints as well as the acquisition of a single fingerprint.

Abstract: An apparatus for distinguishing forged fingerprint and a method thereof are disclosed. A different threshold angle for total reflection is applied when forged fingerprint is touched on a fingerprint input surface of a prism, and the forged fingerprint distinguishing apparatus and method use the above fact. Accordingly, using a separate light source, from which a ray of light is emitted with a light axis at a predetermined range of incident angle, acquired fingerprint image is compared and it is determined whether the fingerprint image corresponds to authentic fingerprint or forged one.

Abstract: A method for biometric authentication and a system using the same are provided. The biometric authentication system of the present invention separates pre-registered biometric information of a user into a plurality of separated biometric information, disperses them to a plurality of databases and manages them. Accordingly, when a user authentication process is needed, the biometric authentication system performs an authentication by obtaining the separated biometric information that are managed by a plurality of databases and composing registered biometric information. The present invention reduces the risk of leakage of biometric information of a user due to hacking or theft since it allows biometric information to be separated, disperse and managed, which conventionally is store as a single file on a server, a database or a security token.

Abstract: An entrance control system having a camera, and a method thereof of controlling entrance are provided. The entrance control system not only controls entrances through a use of an authentication tool based on biometric recognition, but also photographs a person attempting an entry through the camera, maps the information into authentication history and manages the history data. Accordingly, the entrance control system is capable of rejecting an unauthorized person who has forged biometric information such as a forged fingerprint. In order to ensure a reliability of image record of the person, the system processes a facial recognition algorithm to determine if a frontal face of the person is captured, and controls so that an error message is provided to the person if there is an error, and authentication based on biometric recognition is processed only when the face of the person is captured within an image range.

Abstract: A fingerprint recognition apparatus and a method thereof of acquiring fingerprint data are provided. The fingerprint recognition apparatus acquires a user's fingerprint image through a fingerprint sensor, extracts information regarding a fingerprint size, a fingerprint position, a degree of fingerprint contact and a condition of minutiae points, and displays a corresponding error message and guide information through a display unit to encourage a reinput of fingerprint, if determining that the extracted information is not within a predetermined range. As a result, the user is encouraged to input a best quality fingerprint to allow extraction of good print data for either fingerprint enrollment or authentication. The information provided to the user may practically include detailed error and guide information regarding the fingerprint size, a degree with which a fingerprint is pushed to a certain side, a degree of contact or humidity of a fingerprint.

Abstract: Provided are an apparatus and a method for recognizing a fingerprint dually. In the method, an optical sensor unit and a semiconductor sensor unit are prepared such that they are adjacent to each other. The optical sensor unit is driven to obtain a first fingerprint image of a user's fingerprint according to an optical fingerprint recognizing method. A second fingerprint image of the fingerprint is obtained using the semiconductor sensor unit. First fingerprint data is generated from the first fingerprint image, and second fingerprint data is generated from the second fingerprint image. Data that matches with the first fingerprint data and the second fingerprint data are searched for from registration fingerprint data registered in advance so that authentication is performed. When authentication of the first fingerprint data and authentication of the second fingerprint data succeed, it is judged that authentication for the user's fingerprint has finally succeeded.

Abstract: Provided are a fingerprint recognition apparatus including a sterilizing function and a method for sterilizing the same. The fingerprint recognition apparatus includes a sterilizing light source irradiating a sterilizing light on a fingerprint contact surface of a fingerprint sensor to sterilize at all times the fingerprint contact surface which many and unspecified users contact their fingers on repeatedly. Accordingly, it is possible to prevent a route of bacterial infection and improve hygienic conditions.

Abstract: An apparatus for distinguishing forged fingerprint and a method thereof are disclosed. A different threshold angle for total reflection is applied when forged fingerprint is touched on a fingerprint input surface of a prism, and the forged fingerprint distinguishing apparatus and method use the above fact. Accordingly, using a separate light source, from which a ray of light is emitted with a light axis at a predetermined range of incident angle, acquired fingerprint image is compared and it is determined whether the fingerprint image corresponds to authentic fingerprint or forged one.

Abstract: An apparatus for distinguishing living body fingerprint from artificial fingerprint and a method thereof are provided. A living body recognition unit determines whether fingerprint in question is living body fingerprint or not, based on the unique color of the living body fingerprint and a change of the fingerprint color which is caused due to a change of contact pressure when the living body fingerprint is contacted with the fingerprint input window. A fingerprint recognition apparatus computes color information from the fingerprint image acquired by the color image sensor, and color change information based on the change of contact pressure, and determines whether the fingerprint in question is the living body fingerprint by determining whether or not the computed color information meets a reference color range and/or if the color change information meets a reference condition.

Abstract: Provided are a fingerprint recognition apparatus including a sterilizing function and a method for sterilizing the same. The fingerprint recognition apparatus includes a sterilizing light source irradiating a sterilizing light on a fingerprint contact surface of a fingerprint sensor to sterilize at all times the fingerprint contact surface which many and unspecified users contact their fingers on repeatedly. Accordingly, it is possible to prevent a route of bacterial infection and improve hygienic conditions.

Abstract: Provided are an apparatus and a method for recognizing a fingerprint dually. In the method, an optical sensor unit and a semiconductor sensor unit are prepared such that they are adjacent to each other. The optical sensor unit is driven to obtain a first fingerprint image of a user's fingerprint according to an optical fingerprint recognizing method. A second fingerprint image of the fingerprint is obtained using the semiconductor sensor unit. First fingerprint data is generated from the first fingerprint image, and second fingerprint data is generated from the second fingerprint image. Data that matches with the first fingerprint data and the second fingerprint data are searched for from registration fingerprint data registered in advance so that authentication is performed. When authentication of the first fingerprint data and authentication of the second fingerprint data succeed, it is judged that authentication for the user's fingerprint has finally succeeded.