Title:
CAMERA AND METHOD FOR DERIVING ERROR OF SHUTTER SPEED
Document Type and Number:
Japanese Patent JP2010217277
Kind Code:
A
Abstract:
To allow a user to calibrate and adjust shutter accuracy without using a special measuring device or the like.
A still object TC having temporally nearly constant luminance is imaged for a first shutter opening time to obtain a first image, and is imaged for a second shutter opening time to obtain a second image. An actual exposure ratio is derived based on comparison between the first image and the second image. The error of the shutter speed is derived based on a result of comparing a theoretical exposure ratio obtained based on a ratio of theoretical exposure based on the first shutter opening time to theoretical exposure based on the second shutter opening time, with the actual exposure ratio.
Inventors:
SUZUKI TOMOHIKO
Application Number:
JP2009061109A
Publication Date:
September 30, 2010
Filing Date:
March 13, 2009
Export Citation:
Assignee:
OLYMPUS IMAGING CORP
International Classes:
G03B43/02; G03B7/091; G03B9/36; H04N5/225; H04N5/238; H04N101/00
Domestic Patent References:
| JPH09288291A | 1997-11-04 | |||
| JP2000231136A | 2000-08-22 | |||
| JP2005148162A | 2005-06-09 | |||
| JP2000241849A | 2000-09-08 |
Attorney, Agent or Firm:
Masaki Goto
Masahiro Fujii
Masaaki Iida
Masahiro Fujii
Masaaki Iida