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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
6.3 Sharpening
247
Fig. 14 {Continued)
the same as convolving g with the array h
L
defined by
1
1 -4 1
1
in which all points not shown have value 0. Similarly, computing g
V
2
g is
the same as convolving g with A
D
, defined by
-1
-1 5-1
-1
248
6 Enhancement
Fig. 15 (a) High-emphasis filtering using a logarithmic transformation, (b) Results of
filtering. (From [43].)
These space-domain convolution operations can also be performed in the
frequency domain, by multiplying the discrete Fourier transform H
L
(or H
D
)
by G and then inverse transforming
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Publisher Resources

ISBN: 9780323139915