Iris information acquisition apparatus and iris identification apparatus
July 9, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3050711 Scanning line filter Apparatus and method for identifying individuals through their retinal vasculature patterns Image processing system Iris recognition system Method and means for recognizing patterns represented in logarithmic polar coordinates Biometric personal identification system based on iris analysis Compact image steering and focusing device Patent #: 5717512 InventorAssigneeApplicationNo. 350142 filed on 07/09/1999US Classes:382/117, Using a characteristic of the eye382/324Full retinaExaminersPrimary: Werner, Frank E.Attorney, Agent or FirmForeign Patent References
International ClassG06K 009/28Foreign Application Priority Data1998-07-17 JPAbstractAn iris recognition system capable of remarkably reducing time taking from an image pickup of an iris image to generation of an iris code and of simplifying the construction is implemented. A sensor 10 comprises a group of pixels arranged in polar coordinates. An iris image is controlled so that the iris image is correctly formed on the sensor 10, particularly, the center of the iris image matches. The inner and outer diameters of the iris are detected according to the iris image formed on the sensor 10, and the difference between the inner diameter and the outer diameter in the radial direction is detected. The number i of pixels of each ring in the case of division into the predetermined number of concentric ring bands is calculated according to the difference. A weighted mean processing part 13 performs a weighted mean operation according to the number i of pixels. A band-pass filter 15 performs a processing in the tangential and radial directions of feature extraction of the iris image of each ring band and generates the iris code with a binary format formed by a binary circuit 16.Other References
Field of SearchUsing a characteristic of the eyeUsing a facial characteristic Using a fingerprint Extracting minutia such as ridge endings and bifurcations With a guiding mechanism for positioning finger With a prism Bottle inspection IMAGE SENSING Multiple scanning Prescanning Full retina DOCUMENT PATTERN ANALYSIS OR VERIFICATION Image (e.g., fingerprint, face) Image (Fingerprint, Face) Evaluates biometrics Image processor (e.g., video camera) Pattern matching access Biometric acquisition With specific relative positional geometry of photosensitive elements (e.g., an annular photosensitive element surrounding a coaxially mounted photosensitive element) | |
