BR112013031316A2 - sistema de captura de imagem e método para avaliar um grau de nitidez de uma imagem - Google Patents

sistema de captura de imagem e método para avaliar um grau de nitidez de uma imagem

Info

Publication number
BR112013031316A2
BR112013031316A2 BR112013031316A BR112013031316A BR112013031316A2 BR 112013031316 A2 BR112013031316 A2 BR 112013031316A2 BR 112013031316 A BR112013031316 A BR 112013031316A BR 112013031316 A BR112013031316 A BR 112013031316A BR 112013031316 A2 BR112013031316 A2 BR 112013031316A2
Authority
BR
Brazil
Prior art keywords
image
sharpness
generator
edge
focus signal
Prior art date
Application number
BR112013031316A
Other languages
English (en)
Inventor
Hiok Nam Tay
Original Assignee
Hiok Nam Tay
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
Application filed by Hiok Nam Tay filed Critical Hiok Nam Tay
Publication of BR112013031316A2 publication Critical patent/BR112013031316A2/pt

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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)
  • Studio Devices (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

resumo sistema de captura de imagem e método para avaliar um grau de nitidez de uma imagem um sistema de imagem de focagem automático, que inclui uma matriz de pixels acoplados a um gerador de sinal de foco. a matriz de pixels capta uma imagem que tem uma pluralidade de bordas. o gerador gera um sinal de foco, que é uma função de uma pluralidade de medidas de nitidez de borda medidas a partir de cada um de entre a pluralidade de bordas. o gerador compara uma sequência de gradientes de um lado ao outro da borda com uma ou mais sequências de referência de gradientes e/ou curvas de referência definidas por dados obtidos a partir de uma memória não-volátil. o gerador determina a rejeitar ou de-enfatizar a borda de contribuir para o sinal de foco em base de encontrar dissimilaridade entre a seqüência de gradientes com as seqüências de referência ou curvas de referência fora de um determinado limite. 1/1
BR112013031316A 2011-06-09 2011-06-09 sistema de captura de imagem e método para avaliar um grau de nitidez de uma imagem BR112013031316A2 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2011/052524 WO2012168766A1 (en) 2011-06-09 2011-06-09 Auto-focus image system

Publications (1)

Publication Number Publication Date
BR112013031316A2 true BR112013031316A2 (pt) 2016-11-29

Family

ID=44509487

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112013031316A BR112013031316A2 (pt) 2011-06-09 2011-06-09 sistema de captura de imagem e método para avaliar um grau de nitidez de uma imagem

Country Status (10)

Country Link
EP (1) EP2719162B1 (pt)
JP (1) JP5920608B2 (pt)
CN (1) CN103650473B (pt)
BR (1) BR112013031316A2 (pt)
CA (1) CA2838821A1 (pt)
DE (1) DE112011105320T5 (pt)
GB (1) GB2505598A (pt)
MX (1) MX340988B (pt)
SG (1) SG195323A1 (pt)
WO (1) WO2012168766A1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101733028B1 (ko) 2016-05-30 2017-05-08 경북대학교 산학협력단 영상대조에 따른 에지 변위량 예측 방법
KR101868483B1 (ko) * 2016-10-13 2018-07-23 경북대학교 산학협력단 영상 대조에 따른 두개의 에지 블러 파라미터 예측 방법
EP3503528B1 (en) 2017-12-21 2020-10-07 Axis AB Determination of a contrast value for a digital image

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07311025A (ja) * 1994-05-17 1995-11-28 Komatsu Ltd ３次元形状検査装置
US20030123704A1 (en) * 2001-05-30 2003-07-03 Eaton Corporation Motion-based image segmentor for occupant tracking
JP3555607B2 (ja) * 2001-11-29 2004-08-18 ミノルタ株式会社 オートフォーカス装置
JP4661084B2 (ja) * 2004-05-20 2011-03-30 セイコーエプソン株式会社 ミスフォーカス判定方法およびこれに関するプログラム
JP2006115446A (ja) * 2004-09-14 2006-04-27 Seiko Epson Corp 撮影装置、及び画像評価方法
CN1892401A (zh) * 2006-05-25 2007-01-10 南京大学 针对虹膜图像捕捉的时频域多阶段自动对焦方法
JP4743773B2 (ja) * 2006-06-01 2011-08-10 コニカミノルタセンシング株式会社 エッジ検出方法、装置、及びプログラム
JP5353141B2 (ja) * 2008-09-18 2013-11-27 株式会社ニコン プログラム、カメラ、画像処理装置、及び画像の合焦度算出方法
WO2010036249A1 (en) * 2008-09-24 2010-04-01 Nikon Corporation Autofocus technique utilizing gradient histogram distribution characteristics
CN101860680B (zh) * 2009-04-08 2011-12-21 鸿富锦精密工业（深圳）有限公司 影像处理装置及其影像处理方法
JP2011003124A (ja) * 2009-06-22 2011-01-06 Sony Corp 画像処理装置および画像処理プログラム
BR112012013721A2 (pt) * 2009-12-07 2016-03-15 Hiok Nam Tay sistema de imagem de auto-focagem

Also Published As

Publication number Publication date
DE112011105320T5 (de) 2014-04-03
JP2014521990A (ja) 2014-08-28
EP2719162A1 (en) 2014-04-16
WO2012168766A8 (en) 2014-01-30
CN103650473B (zh) 2018-09-04
MX2013014257A (es) 2014-02-27
GB2505598A (en) 2014-03-05
WO2012168766A1 (en) 2012-12-13
MX340988B (es) 2016-08-03
CN103650473A (zh) 2014-03-19
SG195323A1 (en) 2013-12-30
GB201321654D0 (en) 2014-01-22
EP2719162B1 (en) 2016-08-31
JP5920608B2 (ja) 2016-05-25
CA2838821A1 (en) 2012-12-13
WO2012168766A9 (en) 2014-07-03

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Legal Events

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]