An image forming apparatus.

摘要

An image forming apparatus includes an original placement portion and a reference original portion outside of the original placement portion, a scanning device capable of selectively scanning either the original placement portion or the reference original portion, an image forming device for forming an image in accordance with the scanning device, a selection device for selecting the scanning of the original placement portion or the scanning of the reference original portion, and a reading device for reading an image of the reference original portion formed by the image forming device to evaluate a performance of the image forming device. <IMAGE>