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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
232 Image Analysis and Modeling in Ophthalmology
where I(v
i
) is the value of the level of the nearest neighbor of V
i
and
F
i
ext ,
is the direction of
the external force for each vertex, which is dened in Equation 13.10:
F
C
C
i
i
i
ext ,
=
v
v
(13.10)
Therefore, the external force on each vertex can be written as in Equation 13.11:
FFF
ii
i

ext ext ext
,,
,
= (13.11)
The displacement contour is based on the composition of the internal and external forces
on the contour vertices. Each vertex is replaced by the iterative Equation 13.12:
vv
ii
ii
tt
FF
+
()
=
()
++
()
11ββ
int,
e
xt,
(13.12)
where β is a dened weight that controls the rate of ow and the con
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Publisher Resources

ISBN: 9781466559387