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In a spatially adaptive subsampling scheme, the subsampling lattice is adapted to the local spatial frequency content of an image sequence. In this paper, we use rate-distortion theory to show that spatially adaptive subsampling gives a better performance than subsampling with a fixed sampling lattice. A new algorithm that optimally assigns sampling lattices to different parts of the image is presented. The proposed spatially adaptive subsampling method can be applied within a motion-compensated coding scheme as well. Experiments show an increased performance over fixed lattice subsampling
Published in:
Image Processing, IEEE Transactions on
(Volume:3
,
Issue:
5
)
Date of Publication: Sep 1994
- Page(s):
- 492 - 500
- ISSN :
- 1057-7149
- INSPEC Accession Number:
- 4776321
- Digital Object Identifier :
- 10.1109/83.334991
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Sep 1994
- Sponsored by :
- IEEE Signal Processing Society
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