Patent ID: 9661224
Date: 2017-05-23
CPC Classifications: G02B,H04N

Claim:
1. An image shake correcting apparatus for performing an image shake correction, the image shake correcting apparatus comprising: a processor that executes a computer program stored in a memory to control the image shake correcting apparatus to function as units comprising: (1) a high-pass filter configured to remove a low-pass component of a shake detection signal; (2) a dividing unit configured to divide a signal into a low-frequency component and a high-frequency component; and (3) a controlling unit configured to provide control modes comprising (a) a first control mode for performing the image shake correction by using a signal obtained by dividing, by the dividing unit, the shake detection signal processed by the high-pass filter, and (b) a second control mode for performing the image shake correction by using a signal obtained by dividing, by the dividing unit, the shake detection signal not processed by the high-pass filter, and wherein the controlling unit comprises: (a) a first low-pass filter having a variable converging time constant of a filter calculation while integrating the high-frequency component; (b) a second low-pass filter having a variable converging time constant of a filter calculation while integrating the low-frequency component; (c) a combining unit configured to add outputs of the first low-pass filter and the second low-pass filter and to output a control signal of a target position of a correcting unit; and (d) a determining unit configured to obtain the shake detection signal processed by the high-pass filter to determine a switching between the first control mode and the second control mode.