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Advances in Visual Data Compression and Communication
book

Advances in Visual Data Compression and Communication

by Feng Wu
July 2014
Intermediate to advanced content levelIntermediate to advanced
513 pages
16h 40m
English
Auerbach Publications
Content preview from Advances in Visual Data Compression and Communication
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188 9 Directional Filtering Transform
t
1
,t
2
= 1,2,··· ,N/2, where θ is the angle of prediction direction and the vertical
axis in Figure 9.9.
For the modes H
0
H
2
, the horizontal filtering is performed first, followed by
the vertical lifting and unidirectional prediction (see Figure 9.10). With the adap-
tive lifting order, BDF provides us with an evenly distributed set of modes covering
the whole plane. If the image block exhibits a strong vertical correlation, lifting in
the vertical dimension is performed first, and vice versa. Therefore, the directional
correlation can be fully exploited.
As previously mentioned, we take one-level lifting as an example. The hierarchi-
cal structure can be obtained by iteratively performing two dimensional lifting ...
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Publisher Resources

ISBN: 9781482234138