CA2820847A1 - Auto-focus image system - Google Patents

Auto-focus image system Download PDF

Info

Publication number
CA2820847A1
CA2820847A1 CA2820847A CA2820847A CA2820847A1 CA 2820847 A1 CA2820847 A1 CA 2820847A1 CA 2820847 A CA2820847 A CA 2820847A CA 2820847 A CA2820847 A CA 2820847A CA 2820847 A1 CA2820847 A1 CA 2820847A1
Authority
CA
Canada
Prior art keywords
edge
gradient
image
gradients
focus
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.)
Abandoned
Application number
CA2820847A
Other languages
English (en)
French (fr)
Inventor
Hiok Nam Tay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority claimed from PCT/IB2010/055641 external-priority patent/WO2011070513A1/en
Application filed by Individual filed Critical Individual
Publication of CA2820847A1 publication Critical patent/CA2820847A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)
CA2820847A 2010-12-07 2011-06-09 Auto-focus image system Abandoned CA2820847A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IBPCT/IB2010/055641 2010-12-07
PCT/IB2010/055641 WO2011070513A1 (en) 2009-12-07 2010-12-07 Auto-focus image system
PCT/IB2011/052529 WO2012076993A1 (en) 2010-12-07 2011-06-09 Auto-focus image system

Publications (1)

Publication Number Publication Date
CA2820847A1 true CA2820847A1 (en) 2012-06-14

Family

ID=44511103

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2820847A Abandoned CA2820847A1 (en) 2010-12-07 2011-06-09 Auto-focus image system

Country Status (8)

Country Link
EP (1) EP2649788A1 (ja)
JP (1) JP6057086B2 (ja)
AU (1) AU2011340208A1 (ja)
CA (1) CA2820847A1 (ja)
DE (1) DE112011104233T5 (ja)
MX (1) MX2013006516A (ja)
SG (1) SG190755A1 (ja)
WO (1) WO2012076993A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111769904B (zh) * 2020-06-23 2021-08-17 电子科技大学 一种反向散射通信***中多反射设备并行传输的检测方法
CN112529876B (zh) * 2020-12-15 2023-03-14 天津大学 一种隐形眼镜边缘缺陷的检测方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH066661A (ja) * 1992-06-19 1994-01-14 Canon Inc 合焦検出装置
JP2002189164A (ja) * 2000-12-21 2002-07-05 Minolta Co Ltd 光学系制御装置、光学系制御方法および記録媒体
JP4334179B2 (ja) * 2002-03-07 2009-09-30 シャープ株式会社 電子カメラ
JP4493416B2 (ja) * 2003-11-26 2010-06-30 富士フイルム株式会社 画像処理方法および装置並びにプログラム
JP2006024193A (ja) * 2004-06-07 2006-01-26 Fuji Photo Film Co Ltd 画像補正装置、画像補正プログラム、画像補正方法、および画像補正システム
WO2010061250A1 (en) * 2008-11-26 2010-06-03 Hiok-Nam Tay Auto-focus image system
BR112012013721A2 (pt) 2009-12-07 2016-03-15 Hiok Nam Tay sistema de imagem de auto-focagem

Also Published As

Publication number Publication date
MX2013006516A (es) 2013-12-12
JP2014513809A (ja) 2014-06-05
DE112011104233T5 (de) 2013-12-12
EP2649788A1 (en) 2013-10-16
SG190755A1 (en) 2013-07-31
WO2012076993A1 (en) 2012-06-14
JP6057086B2 (ja) 2017-01-11
AU2011340208A1 (en) 2013-07-18

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Legal Events

Date Code Title Description
FZDE Discontinued

Effective date: 20160609