1. An image processing apparatus, comprising: a detecting unit configured to detect a correction candidate area in an image; a print control unit configured to cause a printing apparatus to print, on a sheet, an image not subjected to a predetermined correction process and information indicating at least one correction candidate area in the image detected by said detecting unit, the sheet permitting a user to select at least one area on which the predetermined correction process is to be performed from the at least one correction candidate area by adding onto the sheet, by a user, information for specifying the at least one area from the at least one correction candidate area; an acquiring unit configured to acquire a read image obtained by reading, with a reading apparatus, of the sheet caused to be printed by said print control unit and acquire, based on the read image, the information for specifying the at least one area from the at least one correction candidate area added by the user onto the sheet caused to be printed by said print control unit; a determining unit configured to determine the at least one area in the image selected by the user, based on the information for specifying the at least one area from the at least one correction candidate area added by the user onto the sheet and acquired by said acquiring unit; and an executing unit configured to execute the predetermined correction process on the at least one area in the image determined by said determining unit.