1. An image pickup apparatus comprising: an image pickup section for picking up an image of an object and acquiring an image signal responsive to receiving an instruction signal for starting a single image pickup operation; an accumulation section for sequentially accumulating outputs from the image pickup section during the single image pickup operation to generate an accumulated image signal; a display section for visibly displaying an accumulated image signal of the accumulation section as an accumulation state during the single image pickup operation; a position identification section for identifying a position specified on an image displayed on the display section; and a correction section for performing an image correction process on the accumulated image signal of the accumulation section according to an identification result of the position identification section, wherein the accumulation section continues accumulating outputs after the display section displays an image corrected by the correction section as an accumulated image.