Motion detection device for a photographic apparatus

Details Motion detection device for a photographic apparatus Motion detection device for a photographic apparatus

1997-09-10

1999-03-02

Perkey, W. B.

Photography

Camera shake sensing

With accelerometer

G03B 1700

Patent

active

058782869

ABSTRACT:
A motion detection device for a motion compensation system, suitable for use in a camera, to precisely and quickly compute an omega zero as a reference value for motion compensation, and to perform highly accurate camera motion compensation by using an angular displacement signal which has been accurately calculated with an omega zero as a reference. A mean computation device computes an integration mean value which is a central value of the angular velocity signal based on a signal output from an angular velocity sensor. A setting device sets an omega zero initial estimate value to compute the omega zero reference value. An omega zero computation device computes the omega zero value based on the integration mean value and the omega zero initial estimate value. An integration device converts the omega zero to an angular displacement signal. The integration average value and the omega zero initial estimate value are assigned weights by a reducing function that decreases as time progresses after the beginning of the computation function. A greater weight is placed on the omega zero initial estimate value immediately after the beginning of the computation function, while a greater weight is placed on the integration mean value as time passes after the beginning of the computation function.

REFERENCES:
patent: 5041852 (1991-08-01), Misawa et al.
patent: 5740471 (1998-04-01), Terui

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