Imaging apparatus, flicker detection method, and flicker detection program

A flicker detection method comprising:

• an imaging element driving step of directing an imaging element to alternately perform imaging operations at a first frame rate and a second frame rate being different from the first frame rate;
• and
• a flicker detection step of detecting whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on a first captured image signal obtained by an imaging operation at the first frame rate and a second captured image signal obtained by an imaging operation at the second frame rate,
• wherein a sum of a duration of a first frame period based on the first frame rate and a duration of a second frame period based on the second frame rate is a value obtained by multiplying a reciprocal of the first frequency or the second frequency by a natural number, and
• in the flicker detection step, whether the first flicker is present and whether the second flicker is present are detected, based on a first coincidence between a set of the first captured image signals or a set of the second captured image signals and a second coincidence between the first captured image signal obtained for the first frame period in the imaging operation at the first frame rate and the second captured image signal obtained for the second frame period following the first frame period.

A computer readable medium storing a flicker detection program that causes a computer to perform:

• an imaging element driving step of directing an imaging element to alternately perform imaging operations at a first frame rate and a second frame rate different from the first frame rate;
• and
• a flicker detection step of detecting whether a first flicker of a light source with a first frequency is present and whether a second flicker of a light source with a second frequency is present, based on a first captured image signal obtained by an imaging operation at the first frame rate and a second captured image signal obtained by an imaging operation at the second frame rate,
• wherein a sum of a duration of a first frame period based on the first frame rate and a duration of a second frame period based on the second frame rate is a value obtained by multiplying a reciprocal of the first frequency or the second frequency by a natural number, and
• in the flicker detection step, whether the first flicker is present and whether the second flicker is present are detected, based on a first coincidence between a set of the first captured image signals or a set of the second captured image signals and a second coincidence between the first captured image signal obtained for the first frame period in the imaging operation at the first frame rate and the second captured image signal obtained for the second frame period following the first frame period.