Title:
オートフォーカス装置
Document Type and Number:
Japanese Patent JP4143394
Kind Code:
B2
Abstract:
When a high-frequency component of a video signal that is output from a CCD image sensor ( 1 - 2 ) can be extracted from band-pass filters ( 1 - 13, 1 - 14 ), the band-pass filters ( 1 - 13, 1 - 14 ) are changed in accordance with the number of pixels in the video signal. Even if the spatial sampling frequency (high-frequency component) of the video signal changes, a frequency component of an optimum band can be extracted.
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Inventors:
Kosuke Nobuoka
Application Number:
JP2002361942A
Publication Date:
September 03, 2008
Filing Date:
December 13, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/28; G03B13/36; G02B7/36; G03B5/00; H04N5/232
Domestic Patent References:
| JP10164603A | ||||
| JP8130669A | ||||
| JP4046471A | ||||
| JP6086130A | ||||
| JP11266391A | ||||
| JP2001045360A | ||||
| JP10042184A | ||||
| JP1137886A | ||||
| JP8130670A | ||||
| JP2003274245A |
Attorney, Agent or Firm:
Takayoshi Kokubun