To correct uneven illuminance in the case of photographing an object lighted by an artificial light by storing dispersion in luminous quantity of a light emitted onto the object as correction data and using the correction data so as to correct a photographed image thereby utilizing an image processing function of the electronic still camera.

Dispersion in luminous quantity of a light emitted onto the object is stored as correction data and a photographed image is corrected by using the correction data. In the case of using the electronic still camera 10, first a preliminary photographing mode is selected and setting such as fine adjustment of a position of a camera is made and a shutter key 14 is depressed. Then a test plate is removed and an object of a close-up object is placed instead, the electronic still camera 10 is selected in the main photographing mode and the shutter key 14 is depressed. That is, the electronic still camera 10 conducts preliminary photographing by using the test plate and then the main photographing is conducted after that. In the case of conducting the photographing above, the electronic still camera 10 executes a prescribed program.