Invention Grant
US08018524B2 Image-pickup method and apparatus having contrast and phase difference forcusing methods wherein a contrast evaluation area is changed based on phase difference detection areas 有权
具有对比度和相位差的摄像方法和装置,其中对比度评估区域基于相位差检测区域而改变

  • Patent Title: Image-pickup method and apparatus having contrast and phase difference forcusing methods wherein a contrast evaluation area is changed based on phase difference detection areas
  • Patent Title (中): 具有对比度和相位差的摄像方法和装置,其中对比度评估区域基于相位差检测区域而改变
  • Application No.: US12259476
    Application Date: 2008-10-28
  • Publication No.: US08018524B2
    Publication Date: 2011-09-13
  • Inventor: Masahiro Kawarada
  • Applicant: Masahiro Kawarada
  • Applicant Address: JP Tokyo
  • Assignee: Canon Kabushiki Kaisha
  • Current Assignee: Canon Kabushiki Kaisha
  • Current Assignee Address: JP Tokyo
  • Agency: Cowan, Liebowitz & Latman, P.C.
  • Priority: JP2007-285972 20071102
  • Main IPC: G03B13/36
  • IPC: G03B13/36 G03B13/34
Image-pickup method and apparatus having contrast and phase difference forcusing methods wherein a contrast evaluation area is changed based on phase difference detection areas
Abstract:
The image-pickup apparatus includes an image-pickup element including first type pixels photoelectrically converting an object image formed by a light flux from an optical system and second type pixels photoelectrically converting plural images formed by plural light fluxes divided from the light flux from the optical system, a controller performing contrast detection focus control using signals from pixels in a contrast evaluation area among the first type pixels, and a detector detecting phase differences of respective pairs of images of the plural images using signals from the second type pixels, the pairs of images being respectively formed in plural phase difference detection areas in the contrast evaluation area, and calculating information on an in-focus position of the optical system or object distance for each phase difference detection area based on each phase difference. The controller changes the contrast evaluation area based on the information calculated for the respective phase difference detection areas.
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