Waveform generating apparatus, shake evaluating apparatus, waveform generating method, camera shake amount measuring method, and storage medium

A shake evaluating apparatus configured to evaluate shake of an imaging unit, the shake evaluating apparatus comprising:

• an excitation unit configured to excite the imaging unit;
• a waveform generating apparatus configured to generate an excitation waveform that is used for the excitation unit to excite the imaging unit;
• and
• an image evaluating unit configured to evaluate a captured image captured by the imaging unit while the imaging unit is excited with the excitation waveform,
• wherein the waveform generating apparatus includes:
• a memory storing instructions;
• and
• a processor configured to execute the instructions to:
• acquire a specification of the imaging unit, and
• adjust a reference waveform based on the specification of the imaging unit and generate the excitation waveform,
• wherein the specification includes a weight of the imaging unit, and
• wherein in a case where the weight of the imaging unit is a first value, the processor is configured to adjust the reference waveform to have a larger ratio of vibration equal to or smaller than a first frequency compared to a case where the weight of the imaging unit is a second value smaller than the first value.

A waveform generating method configured to generate an excitation waveform configured to excite an imaging unit in order to evaluate shake of the imaging unit, the waveform generating method comprising the steps of:

• acquiring a specification of the imaging unit, and
• adjusting a reference waveform based on the specification of the imaging unit and generating the excitation waveform,
• wherein the specification includes a weight of the imaging unit, and
• wherein in a case where the weight of the imaging unit is a first value, adjusting the reference waveform to have a larger ratio of vibration equal to or smaller than a first frequency compared to a case where the weight of the imaging unit is a second value smaller than the first value.

A measuring method of a shake amount of a camera, the measuring method comprising the steps of:

• acquiring an excitation waveform according to mass of the camera fixed to an excitation table of an excitation apparatus;
• acquiring an evaluation image by imaging an object while the excitation table is vibrated according to an acquired excitation waveform;
• and
• measuring a blur amount in an image based on the evaluation image,
• wherein the excitation waveform acquired in the step of acquiring the excitation waveform has a larger ratio of vibration equal to or smaller than a first frequency in a case where the mass of the camera has a first value, than that of a second value, which is smaller than the first value.