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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0300678 (1994-09-02) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 359 인용 특허 : 0 |
Iris recognition is achieved by (1) iris acquisition that permits a user to self-position his or her eye into an imager\s field of view without the need for any physical contact, (2) spatially locating the data defining that portion of a digitized video image of the user\s eye that defines solely th
Iris recognition is achieved by (1) iris acquisition that permits a user to self-position his or her eye into an imager\s field of view without the need for any physical contact, (2) spatially locating the data defining that portion of a digitized video image of the user\s eye that defines solely the iris thereof without any initial spatial condition of the iris being provided, and (3) pattern matching the spatially located data defining the iris of the user\s eye with stored data defining a model iris by employing normalized spatial correlation for first comparing, at each of a plurality of spatial scales, each of distinctive spatial characteristics of the respective irises that are spatially registered with one another to quantitatively determine, at each of the plurality of spatial scales, a goodness value of match at that spatial scale, and then judging whether or not the pattern which manifests solely the iris of the user\s eye matches the digital data which manifests solely the model iris in accordance with a certain combination of the quantitatively-determined goodness values of match at each of said plurality of spatial scales.
In a system including an imager having a lens for deriving a focused image of an eye of a user of the system; the improvement comprising: alignment means for permitting said user to self-position his or her eye into said imager\s field of view without the need for any physical contact with said syst
In a system including an imager having a lens for deriving a focused image of an eye of a user of the system; the improvement comprising: alignment means for permitting said user to self-position his or her eye into said imager\s field of view without the need for any physical contact with said system, said alignment means comprises: (a) first edge means having a given outline contour shape of a first given size that is substantially centered with respect to said lens, said first edge means being disposed a first distance in front of said lens; and (b) second edge means having an outline contour shape of a second given size smaller than said first given size that is geometrically similar in shape to said given outline contour shape and is substantially centered with respect to said lens, said second edge means being disposed a second distance in front of said lens that is longer than said first distance by a specified amount, said specified amount being such that said lens forms a focused image of said user\s eye when said user\s eye is maneuvered to a point in space in front of said lens at which said outline contour of said first edge means is substantially totally occluded by said outline contour of said second edge means as viewed by said user\s eye from the point.
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