Image processing device, image processing method, and storage medium

An image processing method comprising:

• outputting a plurality of image signals with different gains applied thereto through one exposure from an imaging element by amplifying a signal output from a pixel unit, which includes a photoelectric conversion unit configured to convert light to electric charge and a charge accumulating unit configured to accumulate the electric charge, with the different gains;
• and
• generating a synthetic image signal by synthesizing the plurality of image signals,
• wherein synthesis proportions of the plurality of image signals in the synthetic image signal are changed according to a common capacity of the charge accumulating unit when the capacity of the charge accumulating unit is shared by all the plurality of image signals at the time of generation of the synthetic image signal.

A non-transitory computer readable medium storing a program causing a computer to execute an image process, the image process comprising:

• outputting a plurality of image signals with different gains applied thereto through one exposure from an imaging element by amplifying a signal output from a pixel unit, which includes a photoelectric conversion unit configured to convert light to electric charge and a charge accumulating unit configured to accumulate the electric charge, with the different gains;
• and
• generating a synthetic image signal by synthesizing the plurality of image signals,
• wherein synthesis proportions of the plurality of image signals in the synthetic image signal are changed according to a common capacity of the charge accumulating unit when the capacity of the charge accumulating unit is shared by all the plurality of image signals at the time of generation of the synthetic image signal.