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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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Chapter 8
Directional DCT Transform
8.1 Introduction
Most of the image compression schemes are constructed upon the identical architec-
ture of the 2D transform followed by entropy coding, for example, JPEG uses the
2D discrete cosine transform (DCT) and variable length coding (VLC) [129], and
JPEG 2000 uses the 2D wavelet transform and Embedded Block Coding with Op-
timized Truncation (EBCOT) [103, 130]. Either 2D DCT or 2D wavelet transform
is implemented by separable 1D transform in horizontal and vertical directions. A
serious drawback of these transforms is that they are ill-suited to approximate im-
age features with arbitrary orientation that is neither vertical nor horizontal. In these
cases, they result in large-magnitude high-frequenc ...
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Publisher Resources

ISBN: 9781482234138