IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD,PROGRAM, AND RECORDING MEDIUM

An image receiving unit receives an input of an image set owned by a first user, an image analyzing unit analyzes each image included in the image set, a tag information setting unit sets tag information items to be assigned to each image based on an analyzing result of each image, and a tag information assigning unit assigns, as main tag information, the tag information, among the tag information items to be assigned to the image, for which a ratio of the number of times of appearances of the tag information to be assigned to the image to the total number of times of appearances of all the tag information items to be assigned to all the images included in the image set is equal to or greater than a first threshold value and is equal to or less than a second threshold value, to the image, for each image.