Enhancement of compressed images

Details Enhancement of compressed images Enhancement of compressed images

2008-04-15

2008-04-15

Sherali, Ishrat (Department: 2624)

Image analysis

Image compression or coding

Reexamination Certificate

active

10974398

ABSTRACT:
A method is provided for recovering an image defined as a function of image coordinates of an image space from compressed data that is a function of transform coordinates in a transform space comprising: a) transforming the compressed data using at least one partial transform to generate a set of intermediate coefficients in a space intermediate between the transform space and said image space; b) adjusting the value of at least one intermediate coefficient and using said adjusted value to generate a set of adjusted intermediate coefficients; and c) recovering the image by transforming the set of adjusted intermediate coefficients to the image space with at least one additional partial transform.

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Rensheng, H. et al.; “A Fast DCT Block Smoothing Algorithm”; 1995; pp. 1-6; Visual Communication and Image Processing Annual Meeting Proceedings, SPIE; vol. 2501; Paper 5; Retrieved from the Internet at <http://olias.arc.nasa.gov/publications/abumada/vcip95.html>.

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