1. An image processing apparatus having: image reading means for reading an image of a document; and image processing means for performing a processing on the image read by the image reading means, and in which an image related to a processing condition of the image read by the image reading means is added to the image read by the image reading means, the image processing apparatus comprising: extracting means for extracting the image related to the processing condition, from the image read by the image reading means, wherein the image processing means performs the processing in accordance with the processing condition based on the image extracted by the extracting means.