Shake detection apparatus, shake detection method, and image blur correction apparatus

An image blur correction apparatus comprising:

• first and second detectors configured to detect shaking;
• a processor configured to process first and second detection signals output from each of the first and second detectors;
• and
• a corrector configured to acquire a shake detection signal and perform image blur correction,
• the processor comprising:
• a first filter unit configured to have a first transmission characteristic determined by a noise density ratio of the first and second detection signals;
• a second filter unit configured to have a second transmission characteristic in which a sum with a value of the first transmission characteristic is a predetermined value;
• and
• an output unit configured to output a shake detection signal generated based on a signal processed by the first filter unit and a signal processed by the second filter unit.

A shake detection method executed by a shake detection apparatus comprising first and second detectors that detect shaking, and a signal processing unit that processes first and second detection signals output from each of the first and second detectors,

• the shake detection method comprising:
• performing signal processing for the detecting signal by a first filter unit having a first transmission characteristic determined by the noise density ratio of the first and second detection signals, in the signal processing unit;
• performing signal processing for the detecting signal by a second filter unit having a second transmission characteristic in which a sum with a value of the first transmission characteristic is a predetermined value, in the signal processing unit;
• and
• outputting a shake detection signal generated based on a signal processed by the first filter unit and a signal processed by the second filter unit, in the signal processing unit.