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Digital Picture Processing, 2nd Edition
book

Digital Picture Processing, 2nd Edition

by Azriel Rosenfeld, Avinash C. Kak
January 2014
Intermediate to advanced content levelIntermediate to advanced
435 pages
18h 42m
English
Morgan Kaufmann
Content preview from Digital Picture Processing, 2nd Edition
336
7
Restoration
The gradient of φ is given by Hunt [50]:
=
ic
Sf
r\i-
ο -
it>yts
b
][c
ee
]-\§
-
S
([§]f))
where
ds(u)
u =
b
t
ds(u)
I
(239)
du
0
du
u—
bi
0
ds(u)
du
u = b
N
2
(240)
with b given by (229). The MAP estimate f must satisfy the equation = 0.
Therefore, from (239) we get the following nonlinear equation for the
estimate
*
[C
x/
] -
1
({ - (J - [SJ'[S
6
][C„] - '(g - s([§]f)) = 0 (241)
where the partial derivatives in the matrix [<S
b
] must now be calculated at
&
= [§]f.
Because of the large dimensionality of the problem, for most images of
practical interest a direct solution of (241) is computationally almost im-
possible. However, when] i
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Publisher Resources

ISBN: 9780323139915