Non-linear filtering of gray scale images

Details Non-linear filtering of gray scale images Non-linear filtering of gray scale images

H - Electricity

04

N

350/48, 350/81

H04N 5/14 (2006.01) G06T 3/40 (2006.01) H04N 5/21 (2006.01)

Patent

CA 1196091

NONLINEAR FILTERING OF GRAY SCALE IMAGES Abstract of the Disclosure Apparatus and method are described for filtering noise from digital video images including means for determining first difference values between intensity values of current pel and one or more preceding pels, means for determining second difference values between intensity values of the current pel and one or more succeeding pels, means for limiting any of the first and second difference values that exceed a predetermined limit value, and means for generating a filtered value for the current pel by adding the intensity value of the pel to a scale summation of the limited first and second difference values.

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