Video imaging apparatus having non-linear input-output...

Details Video imaging apparatus having non-linear input-output... Video imaging apparatus having non-linear input-output...

2005-02-07

2009-12-29

Henn, Timothy J (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S148000, C348S342000

Reexamination Certificate

active

07639287

ABSTRACT:
An imaging apparatus of a wide dynamic range can be achieved at low cost while making improvement in contrast and the maintenance or reduction of a circuit size compatible with each other. The apparatus includes a photoelectric conversion part that converts a signal from a light receiving element into a voltage in accordance with an amount of incident light, an analog signal processing part that processes an analog video signal output from the photoelectric conversion part, an A/D conversion part that converts the analog video signal into a digital video signal, and a high frequency emphasis part that emphasizes a high frequency component of the video signal. The high frequency emphasis part suppresses a low frequency component of brightness in the video signal to emphasize the high frequency component, whereby image data of good contrast can be obtained while keeping a dynamic range of the signal.

REFERENCES:
patent: 5526049 (1996-06-01), Lee
patent: 7164446 (2007-01-01), Konishi
patent: 2003/0081136 (2003-05-01), Kobayashi
patent: 2003/0103649 (2003-06-01), Shimakage
patent: 2004/0175053 (2004-09-01), Kawamata et al.
patent: 2005/0285959 (2005-12-01), Nakajima et al.
patent: 10-233966 (1998-09-01), None
patent: 2002-312781 (2002-10-01), None

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