Digital image enhancing system

Details Digital image enhancing system Digital image enhancing system

2006-10-31

2006-10-31

Ye, Lin (Department: 2622)

Television

Camera, system and detail

With single image scanning device supplying plural color...

C348S241000

Reexamination Certificate

active

07129976

ABSTRACT:
A digital image enhancing system for processing pixel contour data comprises a contour filter, means for edge processing and for local noise reduction to reduce the amount of noise in a pixel luminance or color signal (Sin), means to apply a control signal (Ghpf) indicating the gain of a contour signal, and means to apply a control signal (Gcntr) indicating the gain of the contour as a function of local noise in a picture. The means for edge processing and local noise reduction are arranged such that an output signal (Sout) is supplied in response to said input signal (Sin), to a low pass filtered input signal (Slpf) derived therefrom, and to the contour filter output signal (contour) and the above control signals according to the relation:in-line-formulae description="In-line Formulae" end="lead"?Sout=Gcntr*Ghpf(Sin−Slpf)+SlpfifGcntr*Ghpf<1, andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Sout=Sin+(Ghpf*Gcntr−1)*contour else.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 6697110 (2004-02-01), Jaspers et al.
patent: 6944337 (2005-09-01), Jaspers
patent: 2002/0158979 (2002-10-01), Jaspers

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