Image pickup apparatus for obtaining a better color image over a

Details Image pickup apparatus for obtaining a better color image over a Image pickup apparatus for obtaining a better color image over a

1996-04-16

1998-10-06

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348223, 348675, H04N 5228

Patent

active

058185224

ABSTRACT:
A plurality of shutter times are set to an image pickup device and an image is taken in a way to separate an incident light amount range into a low and a high luminance and, through the signal processing, it is possible to take an image over a wider dark to bright light amount range and, in particular, obtain a better color reproduction over a wider luminance range. In the case where an (R-Y) signal and (B-Y) signal are processed with a low-speed and high-speed shutter signal obtained and the high-speed shutter signal is subjected to logarithmic conversion and a bias signal is applied to provide a continuity with the low-speed shutter signal, processing is performed on a comparing section, characteristic conversion section and calculating section so that a greater one of the (R-Y) and (B-Y) signals is subjected to logarithmic conversion and the other signal is subjected to characteristic conversion in accordance with a value corresponding to a conversion ratio. Further, in the case where a bias voltage is applied to the greater color difference signal, a bias voltage is found in accordance with a ratio of the greater color difference signal and smaller color difference signal and applied to the other smaller color difference signal.

REFERENCES:
patent: 4779137 (1988-10-01), Tojo et al.
patent: 4926247 (1990-05-01), Nagasaki et al.
patent: 5038205 (1991-08-01), Kondo et al.
patent: 5043804 (1991-08-01), Sugiura
patent: 5138458 (1992-08-01), Nagasaki et al.
patent: 5162914 (1992-11-01), Takahashi et al.
patent: 5264944 (1993-11-01), Takemura
patent: 5270802 (1993-12-01), Takagi et al.
patent: 5455621 (1995-10-01), Morimura
patent: 5457494 (1995-10-01), Suga et al.
patent: 5489939 (1996-02-01), Haruki et al.
patent: 5508739 (1996-04-01), Suh
patent: 5565913 (1996-10-01), Matsui et al.
Satou, et al: "A Dynamic Range Extended Color Camera Using Electronic Shuttering Scheme", Proceedings Of The 1995 ITE Annual Convention, Jul. 1995, pp. 63-64.

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