How iris recognition works
Citations
4,146 citations
1,389 citations
Cites background from "How iris recognition works"
...Iris recognition is gaining popularity as a robust and reliable biometric technology [4]....
[...]
1,172 citations
Cites background from "How iris recognition works"
...motion analysis [48], computational stereo [49], and human biometrics [50], [51]....
[...]
1,031 citations
Cites background or methods from "How iris recognition works"
...Sections V and VI analyze alternative score normalization rules that are adapted for differently sized databases, using results from 200 billion iris cross-comparisons....
[...]
...A limitation of current iris recognition cameras is that they require an on-axis image of an eye, which is usually achieved through what may be called a “stop-and-stare” interface, in which a user must align her optical axis with the camera’s optical axis....
[...]
...A limitation of this method is that the affine transformation assumes that the iris is planar, whereas, in fact, it has some curvature....
[...]
933 citations
Cites background or methods from "How iris recognition works"
...More detail on the focusing procedure is given in the appendix of [33]....
[...]
...Daugman suggested that image focus could be measured by calculating the total high frequency power in the 2D Fourier spectrum of the image [31,33]....
[...]
...The proposed method is compared to the authors’ own previous methods and to re-implementations of the methods of Daugman [33], Wildes [168], and Boles and Boashash [9], without implementation of eyelid and eyelash detection....
[...]
...” A 2004 paper [33] said that image acquisition should use nearinfrared illumination so that the illumination could be controlled, yet remain unintrusive to humans....
[...]
...In 2004, Daugman suggested that the iris should have a diameter of at least 140 pixels [33]....
[...]
References
45,034 citations
"How iris recognition works" refers background in this paper
...By contrast, images of different faces look increasingly alike when poorly resolved and can be confused with each other by appearance-based face recognition algorithms....
[...]
13,828 citations
11,674 citations
"How iris recognition works" refers background in this paper
...For example, in face recognition, difficulties arise from the fact that the face is a changeable social organ displaying a variety of expressions, as well as being an active three-dimensional (3-...
[...]
4,816 citations
3,399 citations
"How iris recognition works" refers methods in this paper
...Only phase information is used for recognizing irises because amplitude information is not very discriminating, and it depends upon extraneous factors such as imaging contrast, illumination, and camera gain....
[...]
...The author’s algorithms [8]–[10] for encoding and recognizing iris patterns have been the executable software used in all iris recognition systems so far deployed commercially or in tests, including those by British Telecom, Sandia Labs, U.K. National Physical Lab, Panasonic, LG, Oki, EyeTicket, Sensar, Sarnoff, IBM, SchipholGroup, Siemens, Sagem, IriScan, and Iridian....
[...]
...…have been the executable software used in all iris recognition systems so far deployed commercially or in tests, including those by British Telecom, Sandia Labs, U.K. National Physical Lab, Panasonic, LG, Oki, EyeTicket, Sensar, Sarnoff, IBM, SchipholGroup, Siemens, Sagem, IriScan, and Iridian....
[...]