1. An apparatus, comprising: an acquiring unit configured to acquire a read image obtained by reading of one or more originals by an image reading apparatus; an extracting unit configured to extract one or more candidate areas corresponding to one or more originals in the read image acquired by the acquiring unit, by analyzing the read image; and a deciding unit configured to, in a case where a first candidate area and a second candidate area are extracted by the extracting unit, decide whether each of the first and second candidate areas corresponds individually to one of the originals, based on at least one of a difference tilts in the read image between the first and second candidate areas, a difference of sizes in the read image between the first and second candidate in the read image, and a difference of coordinates in the read image between the first and second candidate areas.