A compact CCD color camera system with digital AWB control

Author

Imaide, Takuya ; Takagi, Yasushi ; Nishizawa, Akihito ; Yamamoto, Mayuko ; Masuda, Michio

Author_Institution

Hitachi Ltd., Yokohama, Japan

Volume

36

Issue

4

fYear

1990

fDate

11/1/1990 12:00:00 AM

Firstpage

885

Lastpage

891

Abstract

A novel signal-processing LSI was successfully developed for a compact CCD (charge coupled device) camera, where incident YRGB signals were converted into desired Y, C-Y signals, filtered, compressed, and automatically white-balanced. In order to realize accurate inner AWB (automatic white-balance) control, some ideas concerning white detection, white reproduction, and control speed were studied and developed with digital circuits. Specifically, digital circuits made a hold function, more accurate white detection, and a variable speed control possible

Keywords

CCD image sensors; colour television cameras; digital control; digital signal processing chips; large scale integration; telecommunications control; CCD color camera system; YRGB signals; automatic white-balance; control speed; digital circuits; signal-processing LSI; variable speed control; white detection; white reproduction; Automatic control; Charge coupled devices; Charge-coupled image sensors; Color; Control systems; Digital cameras; Digital control; Large scale integration; Matrix converters; Signal processing;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.61569

Filename

61569