Shake detection and compensation system using high-pass filter a

Details Shake detection and compensation system using high-pass filter a Shake detection and compensation system using high-pass filter a

1995-05-04

1996-07-09

Gellner, Michael L.

354428, G03B 708

Patent

active

055349676

ABSTRACT:
A camera shake detection apparatus includes a camera shake sensor unit, an HPF arithmetic unit for removing drift and offset components of the camera shake sensor unit, an HPF large signal determination unit for detecting a large shake signal state from an output from the HPF arithmetic unit, a small-time-constant resetting unit for shifting an upper limit frequency for signal removal of the HPF arithmetic unit to a high-frequency side when a large shake is detected by the HPF large signal determination unit, and a time constant increasing unit for shifting the upper limit frequency for signal removal of the HPF arithmetic unit from the high-frequency side to a low-frequency side. According to this arrangement, when the camera shake is large, the offset component is actively removed by the high-pass filter. When the camera shake is small, the camera shake detection frequency band is extended. Therefore, an offset component can be removed from a signal determined to a camera shake signal at any time, and the ratio of effective components in the signal can be accurately and precisely detected.

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