Implementation of a passive automatic focusing algorithm for digital still camera

Author

Lee, Je-Ho ; Kim, Kun-Sop ; Nam, Byung-Deok ; Lee, Jae-Chon ; Kwon, Yong-Moo ; Kim, Hyoung-Gon

Author_Institution

Div. of Electron. & Inf. Technol., Korea Inst. of Sci. & Technol., Seoul, South Korea

Volume

41

Issue

3

fYear

1995

fDate

8/1/1995 12:00:00 AM

Firstpage

449

Lastpage

454

Abstract

A passive AF algorithm for the digital still camera is proposed. As a class of hybrid processing techniques, the proposed algorithm utilizes the two different focus measures by which the best focused image is extracted via two stages. With the paraxial geometric optics model of image formation, some well-known focus measures are investigated and a robust focusing algorithm is designed based on them. The proposed algorithm has been successfully tested on a prototype digital still camera

Keywords

cameras; focusing; geometrical optics; image processing; image processing equipment; digital still camera; focus measures; focused image; hybrid processing techniques; image formation; paraxial geometric optics model; passive automatic focusing algorithm; Digital cameras; Focusing; Image processing; Industrial electronics; Information technology; Instruments; Low pass filters; Multimedia systems; Optical filters; Solid modeling;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.468047

Filename

468047