GB2501414A - Auto-focus image system - Google Patents

Auto-focus image system Download PDF

Info

Publication number
GB2501414A
GB2501414A GB1311741.1A GB201311741A GB2501414A GB 2501414 A GB2501414 A GB 2501414A GB 201311741 A GB201311741 A GB 201311741A GB 2501414 A GB2501414 A GB 2501414A
Authority
GB
United Kingdom
Prior art keywords
edge
pair
auto
focus signal
image system
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.)
Withdrawn
Application number
GB1311741.1A
Other versions
GB201311741D0 (en
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/IB2010/055649 external-priority patent/WO2011070514A1/en
Application filed by Individual filed Critical Individual
Publication of GB201311741D0 publication Critical patent/GB201311741D0/en
Publication of GB2501414A publication Critical patent/GB2501414A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/13—Edge detection
    • 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
    • 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
    • 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
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • 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
    • 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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10141—Special mode during image acquisition
    • G06T2207/10148—Varying focus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection

Abstract

An auto focus image system that includes a pixel array coupled to a focus signal generator. The pixel array captures an image that has a plurality of edges. The generator generates a focus signal that is a function of a plurality of edge-sharpness measures, each one measured from one of the plurality of edges. The generator may determine to reduce a relative extent to which an edge contributes to the focus signal on basis of a pair of shape measures of the edge that are measured from a plurality of sample-pair differences, where each sample-pair difference is a difference between a pair of samples of image data within a predetermined neighborhood of the edge. One of the shape measures may be the edge-sharpness measure of the edge.
GB1311741.1A 2010-12-07 2011-06-09 Auto-focus image system Withdrawn GB2501414A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/IB2010/055649 WO2011070514A1 (en) 2009-12-07 2010-12-07 Auto-focus image system
PCT/IB2011/052515 WO2012076992A1 (en) 2010-12-07 2011-06-09 Auto-focus image system

Publications (2)

Publication Number Publication Date
GB201311741D0 GB201311741D0 (en) 2013-08-14
GB2501414A true GB2501414A (en) 2013-10-23

Family

ID=44628863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1311741.1A Withdrawn GB2501414A (en) 2010-12-07 2011-06-09 Auto-focus image system

Country Status (9)

Country Link
EP (1) EP2649787A1 (en)
JP (1) JP2014504375A (en)
AU (1) AU2011340207A1 (en)
CA (1) CA2820856A1 (en)
DE (1) DE112011104256T5 (en)
GB (1) GB2501414A (en)
MX (1) MX2013006517A (en)
SG (1) SG190451A1 (en)
WO (1) WO2012076992A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017125799A1 (en) * 2017-11-06 2019-05-09 Carl Zeiss Industrielle Messtechnik Gmbh Reduction of picture disturbances in pictures
CN112969027B (en) * 2021-04-02 2022-08-16 浙江大华技术股份有限公司 Focusing method and device of electric lens, storage medium and electronic equipment
CN114815121A (en) * 2022-02-22 2022-07-29 湖北三赢兴光电科技股份有限公司 Quick focusing method and system for camera module

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020114015A1 (en) * 2000-12-21 2002-08-22 Shinichi Fujii Apparatus and method for controlling optical system
US20030099044A1 (en) * 2001-11-29 2003-05-29 Minolta Co. Ltd. Autofocusing apparatus
US20060029284A1 (en) * 2004-08-07 2006-02-09 Stmicroelectronics Ltd. Method of determining a measure of edge strength and focus
US20060062484A1 (en) * 2004-09-22 2006-03-23 Aas Eric F Systems and methods for arriving at an auto focus Figure of Merit
US20090102963A1 (en) * 2007-10-22 2009-04-23 Yunn-En Yeo Auto-focus image system
US20100128144A1 (en) * 2008-11-26 2010-05-27 Hiok Nam Tay Auto-focus image system
GB2475983A (en) * 2009-12-07 2011-06-08 Hiok Nam Tay Reflection symmetry of gradient profile associated with an edge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3482013B2 (en) * 1993-09-22 2003-12-22 ペンタックス株式会社 Optical system focus evaluation method, adjustment method, adjustment device, and chart device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020114015A1 (en) * 2000-12-21 2002-08-22 Shinichi Fujii Apparatus and method for controlling optical system
US20030099044A1 (en) * 2001-11-29 2003-05-29 Minolta Co. Ltd. Autofocusing apparatus
US20060029284A1 (en) * 2004-08-07 2006-02-09 Stmicroelectronics Ltd. Method of determining a measure of edge strength and focus
US20060062484A1 (en) * 2004-09-22 2006-03-23 Aas Eric F Systems and methods for arriving at an auto focus Figure of Merit
US20090102963A1 (en) * 2007-10-22 2009-04-23 Yunn-En Yeo Auto-focus image system
US20100128144A1 (en) * 2008-11-26 2010-05-27 Hiok Nam Tay Auto-focus image system
GB2475983A (en) * 2009-12-07 2011-06-08 Hiok Nam Tay Reflection symmetry of gradient profile associated with an edge

Also Published As

Publication number Publication date
CA2820856A1 (en) 2012-06-14
AU2011340207A1 (en) 2013-07-18
MX2013006517A (en) 2013-12-06
JP2014504375A (en) 2014-02-20
GB201311741D0 (en) 2013-08-14
EP2649787A1 (en) 2013-10-16
WO2012076992A1 (en) 2012-06-14
DE112011104256T5 (en) 2014-02-13
SG190451A1 (en) 2013-07-31

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