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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
8.1 Methods for Generating Projection Data
361
where α
2
(θ) = A
2
cos
2
θ + Β
2
sin
2
θ. Note that α(θ) is equal to the projec-
tion half-width as shown in Fig. 5a.
Now consider the ellipse described above centered at (x
l5
y^ and rotated
by an angle α as shown in Fig. 5b. Let P'(0, t) be the resulting projections.
They are related to P
e
(i) in (3) by
Pe(t)
= Pe-
a
(t-scos(
y
-e)) (4)
where s = y/xi
2
+ yi
2
and γ = tan
-1
^/^).
8.1 METHODS FOR GENERATING PROJECTION DATA
In this section we will show how in various practical applications the
projections of a two-dimensional function are generated.
8.1.1 Computerized X-Ray Tomography
Consider a parallel bea
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Publisher Resources

ISBN: 9780323139915