A land mark used as a key for organizing images captured by, e.g., a digital camera is adequately selected. A association degree adding section (107) weights each landmark according to the degree of association between the captured still image and the landmark by using the distance between the landmark and the imaging place received from a landmark distance calculating section (105) and the distance HL between the imaging place and the address of the residence of the imaging person received from a parameter acquiring section (106). A landmark specifying section (108) specifies one or more landmarks added to the still image from among the landmarks weighted by the association degree adding section (107) and writes them at predetermined positions of the image data on the still image.