Enhancement of digital images

Details Enhancement of digital images Enhancement of digital images

2005-01-11

2011-12-20

Le, Brian (Department: 2624)

Image analysis

Image compression or coding

Transform coding

C382S250000

Reexamination Certificate

active

08081830

ABSTRACT:
Processing of at least one digital image includes performing first and second separable block transforms in first and second directions; modifying results of the second block transforms; and performing first and second separable inverse block transforms in the first and second directions on the modified results. Transform coefficients are re-used while performing at least one the transforms. The processing can be performed on 2-D signals such as still images and 3-D signals such as video.

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A. Nosratinia, “Enhancement of jpeg-compressed images by reapplicationof jpeg,” Journal of VLSI Signal Procesing Systems for Signal,Image, and Video Technology, vol. 27, pp. 69-79, Feb. 2001.
R.R. Coifman and D.L. Donoho, “Translation invariant denoising,” inWavelets and Statistics. Lecture Notes in Statistics. 1995, pp. 125-150,Springer-Verlag.

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