Digital filter and method for producing an output by...

Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed

Reexamination Certificate

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Reexamination Certificate

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06892214

ABSTRACT:
This invention provides a digital filter which permits input data to be little canceled. Based on an input signal, a coefficient is calculated through delay units10, 11, coefficient multiplier units20, 21, 22, adder units30, 31, 32and an offset constant unit40, and the thus obtained coefficient is multiplied by the input signal through coefficient multiplier unit23.

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Copy of Official Action dated Mar. 16, 2004 and its English translation in Japanese patent application No. 2000-059349, which is a counterpart of the present application.
Jain, A.K.; “Fundamentals Of Digital Image Processing”, 1989, Prentice Hall, Englewood Cliffs, NJ, USA, pp. 252-253.
Ramponi, G. et al.; “Nonlinear Unsharp Masking Methods For Image Contrast Enhancement”, Journal of Electronic Imaging, Jul. 1996, vol. 5, No. 3, pp. 353-366.

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