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Image Analysis and Modeling in Ophthalmology
book

Image Analysis and Modeling in Ophthalmology

by Eddie K. Ng, U. Rajendra Acharya, Jasjit S. Suri, Aurelio Campilho
February 2014
Intermediate to advanced content levelIntermediate to advanced
409 pages
16h 38m
English
CRC Press
Content preview from Image Analysis and Modeling in Ophthalmology
237Survey on Techniques Used in Iris Recognition Systems
where:
I(x, y) is the image of iris region
(x, y) are the Cartesian coordinates of origin
(r, θ) are the polar coordinates corresponding to standardized x
p
, y
p
x
1
, y
1
are the coordinates of the pupil and iris boundaries along the θ direction
The rubber sheet model takes account of pupil dilation and inconsistencies in size to
produce a normalized representation with constant dimensions.
In this way, the iris region is modeled by a exible rubber sheet anchored at the iris
boundary with the pupil center as the reference point. The normalized iris is shown in
Figure13.10.
Although the rubber sh ...
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Publisher Resources

ISBN: 9781466559387