Abstract: Techniques for providing an ID image on a print medium are disclosed. Commodity information on a commodity settled in a store is received from a store terminal installed at the store. ID images, defining ID information in a frequency domain and accompanied by attribute information that is used by the store terminal to decide whether or not each of the stored ID images is to be printed, are stored. A correspondence between the commodity information and the stored ID images is also stored. ID images corresponding to the received commodity information from the stored ID images using the stored correspondence are then retrieved. An attribute list, which registers the attribute information of the stored ID images that is used by the store terminal to decide whether or not each of the stored ID images is to be printed, is stored. Thereafter, only the retrieved ID images which have been decided to be printed based on the stored attribute list are transmitted.

Abstract: To provide an advertisement meaningful to a customer at an optimal timing, a store controller (3) receives, from a cash register (7), checkout information relating to a commodity purchased by the customer, creates image search information based on the checkout information, and transmits the image search information to an advertisement search server (2), the advertisement search server (2) retrieves advertising ID images by using the image search information transmitted from the store controller (3) and transmits the advertising ID images to the store controller (3), the store controller (3) transmits the filtered advertising ID images to the cash register (7), the cash register (7) prints the advertising ID images on a receipt (4), a cellular phone (5) photographs the advertising ID images on the receipt 4 and transmits the photographed image to the advertisement search server (2), the advertisement search server (2) transmits a URL associated with the photographed image to the cellular phone (5), and the cel