Image-shake correction apparatus and imaging apparatus
An image-shake correction apparatus includes a shake detection unit configured to detect a shake applied to the image-shake correction apparatus, a shake correction unit configured to correct the shake of an image caused by the shake, a drive unit configured to drive the shake correction unit, a filtering unit configured to remove a specific frequency component from the output of the shake detection unit, a characteristic change unit configured to change the frequency characteristic of the filtering unit, and a temperature detection unit configured to detect temperature of the shake detection unit or a vivinity thereof, wherein the characteristic change unit changes the frequency characteristic of the filtering unit according to the change rate in temperature detected by the temperature detection unit.
1. An image-shake correction apparatus comprising:
a shake detection unit configured to detect a shake applied to the image-shake correction apparatus;
a shake correction unit configured to correct the shake of an image caused by the shake;
a drive unit configured to drive the shake correction unit;
a filtering unit configured to remove a specific frequency component from the output of the shake detection unit;
a characteristic change unit configured to change the frequency characteristic of the filtering unit; and
a temperature detection unit configured to detect temperature of the shake detection unit or a vicinity thereof;
wherein the characteristic change unit changes the frequency characteristic of the filtering unit according to a change rate in temperature detected by the temperature detection unit.
2. The image-shake correction apparatus according to claim 1 , wherein the characteristic change unit changes the frequency characteristic at the time of turning on a power supply or for a predetermined time after the power supply is turned on.
3. The image-shake correction apparatus according to claim 1 , wherein the characteristic change unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit at the time of switching among a plurality of modes.
4. The image-shake correction apparatus according to claim 3 , further comprising a viewfinder switching unit configured to switch between an electronic and an optical viewfinder, wherein the characteristic change unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit when a viewfinder mode is changed by the viewfinder switching unit.
5. The image-shake correction apparatus according to claim 4 , wherein the characteristic change unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit at the time of shooting a still image in the optical viewfinder mode.
6. The image-shake correction apparatus according to claim 3 , wherein the image-shake correction apparatus has a play back mode in which recorded still and moving images are played back, and wherein the characteristic change unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit when the image-shake correction apparatus is switched from the play back mode to a shooting mode.
7. The image-shake correction apparatus according to claim 3 , wherein the characteristic change unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit for a predetermined time after the mode is changed.
8. An imaging apparatus having a plurality of modes, the imaging apparatus comprising:
an image-shake correction apparatus including:
a shake detection unit configured to detect a shake applied to the image-shake correction apparatus;
a shake correction unit configured to correct the shake of an image caused by the shake;
a drive unit configured to drive the shake correction unit;
a filtering unit configured to remove a specific frequency component from the output of the shake detection unit;
a characteristic change unit configured to change the frequency characteristic of the filtering unit; and
a temperature detection unit configured to detect temperature of the shake detection unit or in a vicinity of the shake detection unit;
wherein the characteristic change unit changes the frequency characteristic of the filtering unit according to a change rate in temperature detected by the temperature detection unit at the time of switching the mode.
9. An image-shake correction apparatus, comprising:
a shake detection unit configured to detect a shake applied to the image-shake correction apparatus;
a shake correction unit configured to correct the shake of an image caused by the shake;
a drive unit configured to drive the shake correction unit;
a filtering unit configured to remove a specific frequency component from the output of the shake detection unit;
a temperature detection unit configured to detect temperature of the shake detection unit or in a vicinity of the shake detection unit;
a control unit configured to calculate a change rate in temperature detected by the temperature detection unit and to change the frequency characteristic of the filtering unit,
wherein the control unit changes the frequency characteristic of the filtering unit according to the change rate in temperature.
10. The image-shake correction apparatus according to claim 9 , wherein the control unit changes the frequency characteristic at the time of turning on a power supply or for a predetermined time after the power supply is turned on.
11. An image-shake correction apparatus according to claim 9 , wherein the control unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit at the time of switching among a plurality of modes.
12. The image-shake correction apparatus according to claim 11 , further comprising a viewfinder switching unit configured to switch between an electronic and an optical viewfinder,
wherein the control unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit when a viewfinder mode is changed by the viewfinder switching unit.
13. The image-shake correction apparatus according to claim 12 , wherein the control unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit at the time of shooting a still image in the optical viewfinder mode.
14. The image-shake correction apparatus according to claim 11 , wherein the image-shake correction apparatus has a play back mode in which recorded still and moving images are played back, and
wherein the control unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit when the image-shake correction apparatus is switched from the play back mode to a shooting mode.
15. The image-shake correction apparatus according to claim 11 , wherein the control unit changes the frequency characteristic according to the change rate in temperature detected by the temperature detection unit for a predetermined time after the mode is changed.
16. An image capturing apparatus comprising an image-shake correction apparatus, wherein the image-shake correction apparatus comprises:
a shake detection unit configured to detect a shake applied to the image-shake correction apparatus;
a shake correction unit configured to correct the shake of an image caused by the shake;
a drive unit configured to drive the shake correction unit;
a filtering unit configured to remove a specific frequency component from the output of the shake detection unit;
a temperature detection unit configured to detect temperature of the shake detection unit or in a vicinity of the shake detection unit;
a control unit configured to calculate a change rate in temperature detected by the temperature detection unit and to change the frequency characteristic of the filtering unit,
wherein the control unit changes the frequency characteristic of the filtering unit according to the change rate in temperature.