Suprema Inc.

BoGun Park

Jae Won Lee

Bong Seop Song

Kideok Lee

Hochul Shin

Jinwook Yi

Jae Hyeon Park

SungHa Kim

In accordance with an embodiment, the prism is made slimly to correct the distortion of the fingerprint image such as trapezoidal distortion or the like. Therefore, it is possible to manufacture the optical fingerprint recognition apparatus of a compact size. Further, the imaging lens is arranged to have a de-centering amount and/or a tilt angle with respect to the optical axis, which leads to an effect to implement resolution approaching the diffraction limit.

Optical fingerprint recognition apparatus

A method for an optical fingerprint recognition, the method includes scanning a fingerprint image using a multiple scan which allows alternating a first scan condition and a second scan condition different from each other; determining whether an input fingerprint is a dry fingerprint depending on a darkness level of a fingerprint image derived from the first scan condition; and performing a fingerprint recognition using a fingerprint image derived from the first scan condition or a fingerprint image derived from the second scan condition in accordance with the determination result as to the dry fingerprint.

Method and apparatus for optical fingerprint recognition using multiple scan

An apparatus for processing a fingerprint image, the apparatus includes a noise information estimation unit configured to estimate information for a noise removal from at least two or more images recognized for a first section before a point of time when a fingerprint contact is initiated. The apparatus includes a fingerprint image acquiring unit configured to correct at least one image recognized for a predetermined time period after the completion of the fingerprint contact using the estimated information to acquire the fingerprint image.

Apparatus and method for reducing noise in fingerprint images

A method for an optical fingerprint recognition, the method includes scanning a fingerprint image separately using a multiple exposure which allows alternating a short exposure and a normal exposure; determining whether there is an inflow of external light depending on a darkness level of a fingerprint image derived from the normal exposure; and performing a fingerprint recognition using a fingerprint image derived from the short exposure or the fingerprint image derived from the normal exposure in accordance with the determination result as to the inflow of external light.

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Gyeonggi-do, South Korea

BoGun Park