Filter for adaptive noise reduction and sharpness...

Details Filter for adaptive noise reduction and sharpness... Filter for adaptive noise reduction and sharpness...

2006-02-24

2011-11-22

Sherali, Ishrat I (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C382S268000

Reexamination Certificate

active

08064718

ABSTRACT:
Electronic images that are degraded by noise and data reduction, such as MPEG encoding, display artifacts in the reproduced image, such as ringing (“ripples”) and blocks (“huge pixels”), and noise in the image may be apparent as graininess. By performing image analysis, both on a frame-by-frame and pixel-by-pixel basis it is possible to identify and separate edges in the image, ringing artifacts and the boundaries between block transitions. By applying noise reduction according to the analysis, followed by sharpness enhancement, it is possible to clean up the image for further utilization.

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patent: 2004/010381 (2004-01-01), None
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Ismo Kauppinen and Kari Roth, Improved Noise Reduction in Audio Signals Using Spectral Resolution Enhancement With Time-Domain Signal Extrapolation, Speech and Audio Processing, IEEE Transactions on Speech and Audio Processing, vol. 13, No. 6, Nov. 2005, pp. 1210-1216.

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