IMAGE REGISTRATION DEVICE, IMAGE REGISTRATION SYSTEM, IMAGE REGISTRATION METHOD AND COMPUTER READABLE MEDIUM THAT REGISTER THE ASSOCIATED IMAGE ACQUIRED BY THE ASSOCIATED IMAGE ACQUISITION UNIT WITH THE ASSOCIATED IMAGE BEING ASSIGNED TO THE PREDETERMINED PROCESS.

An image registration device includes: an associated image acquisition unit that acquires an associated image associated with a document image read from a medium on which the document image is formed, a predetermined process being to be performed on the document image; and a registration unit that registers the associated image acquired by the associated image acquisition unit with the associated image being assigned to the predetermined process.