1. An image processing apparatus comprising: a frame specifying processor which specifies, from within a dynamic image, a frame having a background which is to be used; a background region specifying section which specifies a background region from an image of the specified frame; a background generator which generates an entire background from the specified background region and outputs a background data; and a non-background region setting section which creates a non-background region data in which a non-background region flag is set within a region where no background exists in the entire background which is generated, said background data and said non-background region data forming a background object image.