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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
6.2 Gray Scale Modification
233
This means that the number of points in / that have gray levels z
x
,...
9
z
kl
_
x
is at most q
x
. Evidently, all of these points should be given gray level z
x
in
the transformed picture /'. In addition, if there are fewer than q
x
of these
points,
some of the points of/that have gray level z
k{
should also be given
gray level z
x
in /'. (One can choose these points randomly, or one can make
their choice depend on the gray levels of their neighboring points—e.g.,
use points having low average neighborhood gray levels first.)
Next, let
Σ
Pi ^ ?i +
a
2 < Σ Pi
i
=
1
i
=
1
This tells us which points of/should be given gray
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Publisher Resources

ISBN: 9780323139915