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Microscope Image Processing
book

Microscope Image Processing

by Qiang Wu, Fatima Merchant, Kenneth Castleman
July 2010
Intermediate to advanced
576 pages
17h 29m
English
Academic Press
Content preview from Microscope Image Processing
6.4.2 Differential Wavelet Transform
and Multiscale Pointwise Product
Since edge sharpening is an essential part of image enhancement and edges can
be detected and characterized by differential operators, a particular family
of differential wavelets has been used for this purpose [11, 22]. In this case the
approximation and detail coefficients of the differential wavelet transform of an
image f are defined as S
2
j
f and W
2
j
f , and the wavelet transform is computed
using the following equations:
S
2
j
f ¼ S
2
j1
f h
"2
j1
W
2
j
f ¼ S
2
j1
f g
"2
j1
,1# j # J (6:35)
where h and g are the low-pass and high-pass filters, respectively, and "2
j1
is the
up-sampling operation by putting 2
j1
1 zeros between each pair of adjacent
samples in the filter [11]. This differential ...
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Publisher Resources

ISBN: 9780080558547