A new automatic exposure system for digital still cameras

Author

Kuno, Tetsuya ; Sugiura, Hiroaki ; Matoba, Narihiro

Author_Institution

Image Syst. Lab., Mitsubishi Electr. Corp., Kyoto, Japan

Volume

44

Issue

1

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

192

Lastpage

199

Abstract

This paper presents a newly developed automatic exposure (AE) system for digital still cameras (DSC). The through the lens (TTL) system which has been employed mainly by conventional camcorders has been applied as an exposure control system for DSCs. However, the TTL system requires a longer time to obtain an appropriate exposure value, and it is therefore not a suitable control method for DSCs which demand immediate imaging after the shutter button is pushed. The authors have developed a high-precision AE capable of controlling the exposure quickly by converting the brightness of an object directly using the obtained value of an integrated image without using the photometric sensors other than a charge coupled device (CCD). They have also confirmed that the new system enables excellent exposure control without any problem

Keywords

CCD image sensors; cameras; image processing; CCD; automatic exposure system; brightness; charge coupled device; digital still cameras; exposure control; exposure control system; integrated image; through the lens system; Automatic control; Brightness; Charge coupled devices; Charge-coupled image sensors; Control systems; Digital cameras; Image converters; Lenses; Photometry; Video equipment;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.663747

Filename

663747