A digital multifunction peripheral includes a communication unit which inputs document image data, a processing circuit which processes the document image data from the communication unit, a print unit which prints an image corresponding to the document image data processed by the processing circuit, and a memory which holds a ground pattern image file which is generated by converting ground pattern image data into a machine dependent format extractable only by the processing circuit and is registered from outside. The processing circuit extracts the ground pattern image data from the ground pattern image file in a case where document image data of a ground pattern print object is input from the communication unit, and embeds the ground pattern image data into the document image data.