1. A method for processing an image obtained by reading an original plate on which at least one original is placed, the method comprising: a determining step of determining whether the image is corresponding to one original or a plurality of originals placed on the original plate; an extracting step of extracting, from the image, one original image component corresponding to the one original or a plurality of original image components corresponding to the plurality of originals; and a processing step of performing image processing on the one or the plurality of extracted original image components, the image processing being different in accordance with the result of the determining step.