1. An image pickup apparatus comprising: an accumulation unit configured to make an image pickup device perform a plurality of times of charge storage and charge readout at a predetermined interval to obtain a plurality of images; a photometry unit configured to perform photometry to the plurality of images to obtain a plurality of photometry values; a detection unit configured to detect a light-amount variation characteristic of light from an object based on the plurality photometry values; a combining unit configured to apply a combining process to the plurality of images to obtain a combined image; and an object recognition unit configured to apply an object recognition process to detect the object in the combined image.