CA2820847A1 - Auto-focus image system - Google Patents
Auto-focus image system Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 claims description 84
- 238000003708 edge detection Methods 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 15
- 230000005484 gravity Effects 0.000 claims description 9
- 238000012937 correction Methods 0.000 description 27
- 230000006870 function Effects 0.000 description 22
- 230000008859 change Effects 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000003491 array Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000004422 calculation algorithm Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
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)
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 (enExample) |
| JP (1) | JP6057086B2 (enExample) |
| AU (1) | AU2011340208A1 (enExample) |
| CA (1) | CA2820847A1 (enExample) |
| DE (1) | DE112011104233T5 (enExample) |
| MX (1) | MX2013006516A (enExample) |
| SG (1) | SG190755A1 (enExample) |
| WO (1) | WO2012076993A1 (enExample) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769904B (zh) * | 2020-06-23 | 2021-08-17 | 电子科技大学 | 一种反向散射通信系统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 |
| CN114814881B (zh) * | 2022-04-15 | 2025-09-23 | 深圳市灵明光子科技有限公司 | 一种激光测距方法及激光测距芯片 |
| CN115482542A (zh) * | 2022-09-30 | 2022-12-16 | 中国银行股份有限公司 | 图像边缘的确定方法和装置 |
Family Cites Families (7)
| 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 |
| MX2012006468A (es) | 2009-12-07 | 2012-11-29 | Hiok Nam Tay | Sistema de imágenes de enfoque automático. |
-
2011
- 2011-06-09 AU AU2011340208A patent/AU2011340208A1/en not_active Abandoned
- 2011-06-09 JP JP2013542633A patent/JP6057086B2/ja not_active Expired - Fee Related
- 2011-06-09 SG SG2013044219A patent/SG190755A1/en unknown
- 2011-06-09 MX MX2013006516A patent/MX2013006516A/es active IP Right Grant
- 2011-06-09 EP EP11748716.5A patent/EP2649788A1/en not_active Ceased
- 2011-06-09 WO PCT/IB2011/052529 patent/WO2012076993A1/en not_active Ceased
- 2011-06-09 DE DE112011104233T patent/DE112011104233T5/de not_active Withdrawn
- 2011-06-09 CA CA2820847A patent/CA2820847A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2011340208A1 (en) | 2013-07-18 |
| DE112011104233T5 (de) | 2013-12-12 |
| SG190755A1 (en) | 2013-07-31 |
| JP6057086B2 (ja) | 2017-01-11 |
| JP2014513809A (ja) | 2014-06-05 |
| MX2013006516A (es) | 2013-12-12 |
| EP2649788A1 (en) | 2013-10-16 |
| WO2012076993A1 (en) | 2012-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20160609 |