Title:
IMAGE TREMOR CORRECTION DEVICE, CONTROL METHOD OF THE SAME, OPTICAL DEVICE AND IMAGING DEVICE
Document Type and Number:
Japanese Patent JP2015219445
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To highly accurately correct an image tremor as reducing a computation load or circuit size.SOLUTION: An image tremor correction device comprises a gyro sensor 14 that detects a tremor, and a high-pass filter 62 and low-pass filter 63 are configured to separate the detection signal to a frequency band. Each signal having the frequency band separated is converted into a digital signal, respectively, by A/D converters 64a and 64b different in a sampling rate. A high frequency prediction processing unit 50a and a low frequency prediction processing unit 50b are configured to perform respective linear predictions by an adaptive algorithm updating a filter coefficient from each signal having the frequency band separated as needed. An addition unit 66 is configured to perform an addition synthesis of a signal increasing a sampling rate by an up-sampling unit 65 relative to an output signal of the high frequency prediction processing unit 50a and an output signal of the low frequency prediction processing unit 50b. An addition signal is converted into an angle signal by an integration unit 67, and an image tremor correction is made so as to cancel out an amount of tremor to be indicated by the angle signal.
Inventors:
KAJIMURA FUMIHIRO
Application Number:
JP2014104280A
Publication Date:
December 07, 2015
Filing Date:
May 20, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
G03B5/00; H04N5/232
Domestic Patent References:
| JP2013118450A | 2013-06-13 | |||
| JPH05204013A | 1993-08-13 | |||
| JP2010026384A | 2010-02-04 | |||
| JP2009272890A | 2009-11-19 | |||
| JP2007067914A | 2007-03-15 | |||
| JPH0540291A | 1993-02-19 |
Foreign References:
| US20080152332A1 | 2008-06-26 |
Attorney, Agent or Firm:
Ryoichi Takaoka