PURPOSE: To exactly perform recovery processing by performing recovery continuously from an interrupted position after an image is, stored again in an image memory when the presence/absence and change of the image in the image memory are detected at the time of recovery and no image is remained in the image memory or the image is chanted.
CONSTITUTION: An image inputted to an image sensor part 9 is processed by a signal controlled by a CPU circuit part 27, and directly inputted to an exposure control part 10 or inputted to the exposure control part 10 after it is temporarily stored in the image memory and read out again. When there is no image stored in the storage means or the change of the image is detected by a detecting means at the time of a restart operation after the processing is interrupted during an image forming operation, the image is stored again in the storage means, and the interrupted image forming operation is continued later.
SUZUKI YOSHIHIKO
KUTSUWADA SATORU