Image pickup apparatus having computational gamma correction fac

Details Image pickup apparatus having computational gamma correction fac Image pickup apparatus having computational gamma correction fac

1996-03-29

1998-10-06

Flynn, Nathan J.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348254, 348674, H04N 520

Patent

active

058185216

ABSTRACT:
There is provided a novel and improved image pickup apparatus which can be reduced in size and low power consumption because of its reduced circuit scale and in which no degradation of image quality occurs at the switching points between a plurality of functions. Such an image pickup apparatus comprises a non-linear circuit for performing non-linear correction of a digitized video signal, and the non-linear circuit includes a multiplier having an input terminal formed by input bits the number of which is n.sub.1, n.sub.1, being selected to meet a relationship of n.sub.3 >n.sub.1, where n.sub.3 represents the number of input bits of the non-linear circuit. The non-linear circuit also has predetermined input ranges R.sub.i each of which is selected to be R.sub.i .ltoreq.2.sup.n1 -1, and is formed by a combination of characteristics of the respective predetermined input ranges R.sub.i.

REFERENCES:
patent: 5089890 (1992-02-01), Takayama
patent: 5243426 (1993-09-01), Murayama
patent: 5481317 (1996-01-01), Hieda

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