Image pickup apparatus capable of reducing influence of flicker, method of controlling the same, and storage medium

A process of controlling an image pickup apparatus including an image pickup unit, the process comprising:

• a first flicker detection step of detecting light amount change period of flicker based on a plurality of image data, each of which is obtained at a time interval shorter than one cycle of light amount change period of flicker;
• a second flicker detection step of detecting light amount change period of flicker based on a plurality of image data, each of which is obtained at a time interval more than the one cycle of light amount change period of flicker while starting at different timings for each region of the image pickup unit;
• a storage process step of storing an information corresponding to the light amount change period based on a result of the second flicker detection into a memory;
• and
• a processing step of suppressing flicker, on the image obtained by the image pickup unit,
• wherein, in a case where a valid information corresponding to the light amount change period based on a result of the second flicker detection has been stored in the memory and the process shifts to the processing for obtaining the still image during the processing for obtaining the movie image, the processing for suppressing flicker is performed based on the information stored in the memory without the first flicker detection step performed,
• wherein, in a case where the valid information has not been stored in the memory and the process shifts to the processing for obtaining the still image during the processing for obtaining the movie image, the first flicker detection is performed, and the processing for suppressing flicker is performed based on the result of the first flicker detection.

A non-transitory computer-readable storage medium storing a computer-executable program for executing a process of controlling an image pickup apparatus that includes an image pickup unit, the process comprising:

• a first flicker detection step of detecting light amount change period of flicker based on a plurality of image data, each of which is obtained at a time interval shorter than one cycle of light amount change period of flicker;
• a second flicker detection step of detecting light amount change period of flicker based on a plurality of image data, each of which is obtained at a time interval more than the one cycle of light amount change period of flicker while starting at different timings for each region of the image pickup unit;
• a storage process step of storing an information corresponding to the light amount change period based on a result of the second flicker detection into a memory;
• and
• a processing step of suppressing flicker, on the image obtained by the image pickup unit,
• wherein, in a case where the valid information corresponding to the light amount change period based on a result of the second flicker detection has been stored in the memory and the process shifts to the processing for obtaining the still image during the processing for obtaining the movie image, the processing for suppressing flicker is performed based on the information stored in the memory without the first flicker detection step performed,
• wherein, in a case where the valid information has not been stored in the memory and the process shifts to the processing for obtaining the still image during the processing for obtaining the movie image, the first flicker detection is performed and the processing for suppressing flicker is performed based on the result of the first flicker detection.