IMAGE PROCESSING APPARATUS, CONTROL METHOD THEREOF AND STORAGE MEDIUM

To make it possible to perform registration by making the same the unit format of a value in a case where the value corresponding to a predetermined keyword within a business form is extracted and registered in a management server or the like. In a case where a value corresponding to a predetermined keyword in accordance with its type is extracted from a business form image, a character string indicating a unit thereof is acquired and after converting the unit into a unit format determined in a registration destination, extraction results are output.