Patent ID: 11895421
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A control apparatus to control focal point adjustment operation of an imaging optical system, the control apparatus comprising:
at least one processor;
a memory coupled to the at least one processor, the memory storing instructions that, when executed by the processor, cause the processor to function as:
a calculation unit configured to calculate a focal point evaluation value for each of images captured successively by the imaging optical system;
a determination unit configured to determine whether an amount of change in the focal point evaluation value calculated by the calculation unit with respect to a reference value is greater than or equal to a first threshold;
a first count unit configured to count a number of times the determination unit determines that the amount of change in the focal point evaluation value is greater than or equal to the threshold;
a second count unit configured to count a number of frames;
a storage unit configured to store the number of times counted by the first count unit, wherein the number of times counted by the first count unit is reset in a case where the number of frames counted by the second count unit is greater than or equal to a second threshold; and
a control unit configured to control the imaging optical system so that the focal point adjustment operation is executed in a case where the number of times counted by the first count unit is greater than or equal to a third threshold before the number of frames counted by the second count unit is greater than or equal to the second threshold.