Title:
撮像装置及びオートフォーカス方法及びプログラム及び記憶媒体
Document Type and Number:
Japanese Patent JP4143395
Kind Code:
B2
Abstract:
It is an object of this invention to realize stable autofocus operation by reducing the influence of an object which is different from a main object and exists on the periphery of a distance measurement frame on the autofocus operation. In order to achieve this object, an image sensing apparatus includes an image sensing device which generates an image sensing signal by photoelectrically converting light from an object, an extraction unit which extracts a predetermined frequency component from a signal component corresponding to a focus detection area in a frame sensed by the image sensing device, a weighting circuit which weights the predetermined frequency component extracted by the extraction unit, and a driving unit which moves a focusing lens to an in-focus position on the basis of the signal weighted by the weighting circuit.
Inventors:
Yoshihiro Kobayashi
Yuji Eiki
Yuji Eiki
Application Number:
JP2002363111A
Publication Date:
September 03, 2008
Filing Date:
December 13, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/28; G03B13/36; G02B7/36; H04N5/232; H04N101/00
Domestic Patent References:
| JP60264168A | ||||
| JP61281774A | ||||
| JP3096178A | ||||
| JP7123313A | ||||
| JP9093481A | ||||
| JP9054244A | ||||
| JP6268896A | ||||
| JP2000155257A | ||||
| JP2001272710A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura