Referenced Items are not available for this document.
Calculations based on high-resolution quantizations prove that the distortion rate D(R¯) of an image transform coding is proportional to 2-2R when R¯ is large enough. In wavelet and block cosine bases, we show that if R¯<1 bit/pixel, then D(R¯) varies like R¯1-2γ, where γ remains of the order of 1 for most natural images. The improved performance of embedded codings in wavelet bases is analyzed. At low bit rates, we show that the compression performance of an orthonormal basis depends mostly on its ability to approximate images with a few nonzero vectors
Published in:
Signal Processing, IEEE Transactions on
(Volume:46
,
Issue:
4
)
Date of Publication: Apr 1998
- Page(s):
- 1027 - 1042
- ISSN :
- 1053-587X
- INSPEC Accession Number:
- 5887670
- Digital Object Identifier :
- 10.1109/78.668554
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Apr 1998
- Sponsored by :
- IEEE Signal Processing Society
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