Falsification discrimination method for iris recognition system
First Claim
1. A falsification discrimination method for an iris recognition system, comprising:
- a first step of imaging a user'"'"'s eye when the user approaches a field of view, processing the image signal, and determining whether the image is precisely focused;
a second step of selectively lighting a light emitting diode installed near a camera during imaging while checking if the reflected image of a corresponding light emitting diode is presented in the image of the iris and pupil; and
a third step of determining that the iris is a falsification and informing the system of the fact if the reflected image of the corresponding light emitting diode is not detected as the result of the comparison, and determining whether the iris is really recognized if the image is detected, wherein the selectively lighting of the light emitting diode comprises lighting at least two distinct light sources, and wherein the determining that the iris is a falsification comprises determining whether the reflected image comprises images of reflections of sequential lighting of the light emitting diodes corresponding to images of predetermined reflections of the sequential lighting of the light emitting diodes.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a technique for checking if the reflected image of a light emitting diode for lighting is detected in the image of an iris and determining whether the iris is a living one in order to prevent an illegal intrusion using a simulacrum such as a photograph or dynamic image. The object of the present invention is achieved by a first step of imaging an eye of the user when the user approaches the field of view, processing the image signal, and capturing the image of the iris and pupil, a second step of selectively lighting LEDs for lighting installed on the both sides of a camera while imaging the eye of the user and detecting the reflected image of a corresponding LED in the image of the iris and pupil, a third step of determining that the iris is a falsification and informing the system of the fact if the reflect image of a the corresponding light emitting diode is not detected in the above steps, and determining that the iris is really recognized if detected, and a fourth step of performing a recognition of an iris image signal using a database if the iris is proven to be really recognized and determining whether the image is data registered in the database.
-
Citations
26 Claims
-
1. A falsification discrimination method for an iris recognition system, comprising:
-
a first step of imaging a user'"'"'s eye when the user approaches a field of view, processing the image signal, and determining whether the image is precisely focused;
a second step of selectively lighting a light emitting diode installed near a camera during imaging while checking if the reflected image of a corresponding light emitting diode is presented in the image of the iris and pupil; and
a third step of determining that the iris is a falsification and informing the system of the fact if the reflected image of the corresponding light emitting diode is not detected as the result of the comparison, and determining whether the iris is really recognized if the image is detected, wherein the selectively lighting of the light emitting diode comprises lighting at least two distinct light sources, and wherein the determining that the iris is a falsification comprises determining whether the reflected image comprises images of reflections of sequential lighting of the light emitting diodes corresponding to images of predetermined reflections of the sequential lighting of the light emitting diodes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A falsification discrimination method for an iris recognition system, comprising:
-
a first step of imaging a user'"'"'s eye when the user approaches a field of view, processing the image signal, and capturing the image of an iris and pupil;
a second step of selectively lighting a fight emitting diode installed near a camera during imaging while checking if the reflected image of a corresponding light emitting diode is presented in the image of the iris and pupil; and
a third step of determining whether the iris image is data registered in a database and informing the system of the rejection of a non-living iris if the iris is not really recognized and determining whether the iris is a falsification if the iris is really recognized, wherein the selectively lighting of the light emitting diode comprises lighting at least two distinct light sources, and wherein the determining that the iris is a falsification comprises determining whether the reflected image comprises images of reflections of sequential lighting of the light emitting diodes corresponding to images of predetermined reflections of the sequential lighting of the light emitting diodes. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. In an iris recognition system, a falsification discrimination apparatus for an iris recognition system, comprising:
-
a camera for imaging the eye of a person attempting to be recognized;
an iris image processing unit for capturing the image of the iris and pupil by processing an output image signal of the camera, outputting a lighting control signal of light emitting diodes while confirming whether a LED image is presented on a corresponding image in the pupil image, and determining whether the iris image is true or false;
a light emitting diode drive unit for selectively lighting the light emitting diodes for lighting installed at the right and left sides of the camera from the eye according to the lighting control signal;
a distance measurement unit for measuring the distance from the camera to the eye utilizing infrared light; and
an iris recognition unit for performing an iris recognition process using a database when it is confirmed that the iris is imaged as the result of the comparison, and determining that the iris image is a falsification by determining whether the reflected image of a corresponding light emitting diode comprises images of reflections of sequential lighting of the light emitting diodes corresponding to images of predetermined reflections of the sequential lighting of the light emitting diodes. - View Dependent Claims (16, 17, 18)
-
-
19. In an iris recognition system, a falsification discrimination apparatus for an iris recognition system, comprising:
-
a camera for imaging the eye of a person attempting to be recognized;
an iris image processing unit for capturing the image of the iris and pupil by processing an output image signal of the camera, outputting a lighting control signal of light emitting diodes while confirming whether a LED image is presented on a corresponding image in the pupil image, and determining whether the iris image is true or false;
a light emitting diode drive unit for selectively lighting the light emitting diodes for lighting installed at the right and left sides of the camera from the eye according to the lighting control signal;
a distance measurement unit for measuring the distance from the camera to the eye utilizing infrared light;
an iris recognition unit for performing an iris recognition process using a database when it is confirmed that the iris is imaged as the result of the comparison; and
an informing unit for informing the system of iris recognition and falsification, and determining that the iris image is a falsification by determining whether the reflected image of a corresponding light emitting diode comprises images of reflections of sequential lighting of the light emitting diodes corresponding to images of predetermined reflections of the sequential lighting of the light emitting diodes. - View Dependent Claims (20, 21, 22)
-
-
23. A method, comprising:
-
lighting an eye using a first distinct light source;
processing a first iris image of said eye including a first reflection of said first distinct light source off said eye;
detecting a first pupil position of said eye and a first reflection position of said first distinct light source on said eye;
determining whether said first reflection position is correct;
lighting said eye using a second distinct light source in a position different from said first distinct light source;
processing a second iris image of said eye including a second reflection of said second distinct light source off said eye;
detecting a second pupil position of said eye and a second reflection position of said second distinct light source on said eye; and
determining whether said second reflection is correct, wherein if said first and said second reflections are correct, then an iris recognition is performed. - View Dependent Claims (24)
identifying a person after said first and second reflection positions are determined to be correct by identifying said eye in a database.
-
-
25. A falsification discrimination method for an iris recognition system, comprising:
-
selectively lighting light sources installed at the iris recognition system; and
determining that an iris image is a falsification by determining whether the reflected image of a corresponding light source comprises iris images of reflections of sequential lighting of the light sources corresponding to images of predetermined reflections of the sequential lighting of the light sources. - View Dependent Claims (26)
-
Specification