JPH04267210A - Automatic focussing device - Google Patents

Automatic focussing device

Info

Publication number
JPH04267210A
JPH04267210A JP2884091A JP2884091A JPH04267210A JP H04267210 A JPH04267210 A JP H04267210A JP 2884091 A JP2884091 A JP 2884091A JP 2884091 A JP2884091 A JP 2884091A JP H04267210 A JPH04267210 A JP H04267210A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
contrast
area
up
value
device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2884091A
Inventor
Kazuya Kobayashi
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To provide a automatic focussing device which can rapidly detect a position to be focused even though no object having a high contrast is present in a designated area.
CONSTITUTION: In an automatic focusing device comprising a pick-up lens 1 driven mainly by a motor 8, an image pick-up element 2, an image processing circuit 3 and a BPF circuit 5 for extracting a contrast value of an object to be picked up, an area having a high contrast value, adjacent to a designated area to be focused from which a peak value of contrast values cannot be detected, is automatically selected, instead of the a designated area.
COPYRIGHT: (C)1992,JPO&Japio
JP2884091A 1991-02-22 1991-02-22 Automatic focussing device Pending JPH04267210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2884091A JPH04267210A (en) 1991-02-22 1991-02-22 Automatic focussing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2884091A JPH04267210A (en) 1991-02-22 1991-02-22 Automatic focussing device

Publications (1)

Publication Number Publication Date
JPH04267210A true true JPH04267210A (en) 1992-09-22

Family

ID=12259567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2884091A Pending JPH04267210A (en) 1991-02-22 1991-02-22 Automatic focussing device

Country Status (1)

Country Link
JP (1) JPH04267210A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006166400A (en) * 2004-11-11 2006-06-22 Matsushita Electric Ind Co Ltd Imaging apparatus and imaging method
JP2008046342A (en) * 2006-08-15 2008-02-28 Fujifilm Corp Photographing device and in-focus position search method
US7876980B2 (en) 2004-11-11 2011-01-25 Panasonic Corporation Imaging apparatus and imaging method for outputting a specified number of pixels in a specified area
EP3026888A2 (en) 2014-11-28 2016-06-01 Fujitsu Limited Focus control device, program for focus control, and method for focus control

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006166400A (en) * 2004-11-11 2006-06-22 Matsushita Electric Ind Co Ltd Imaging apparatus and imaging method
US7876980B2 (en) 2004-11-11 2011-01-25 Panasonic Corporation Imaging apparatus and imaging method for outputting a specified number of pixels in a specified area
JP2008046342A (en) * 2006-08-15 2008-02-28 Fujifilm Corp Photographing device and in-focus position search method
EP3026888A2 (en) 2014-11-28 2016-06-01 Fujitsu Limited Focus control device, program for focus control, and method for focus control
JP2016102900A (en) * 2014-11-28 2016-06-02 富士通株式会社 Focus control device and focus control program
US20160156833A1 (en) * 2014-11-28 2016-06-02 Fujitsu Limited Focus control device, non-transitory computer readable recording medium having therein program for focus control, and method for focus control
US9621788B2 (en) 2014-11-28 2017-04-11 Fujitsu Limited Focus control device, non-transitory computer readable recording medium having therein program for focus control, and method for focus control

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Legal Events

Date Code Title Description
A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20000919