An image dictionary creating apparatus includes: an information obtaining unit that obtains results of character recognition processing for an input image; a character string selection unit that selects character strings adjacent to each other in the input image based on the results of character recognition obtained by the information obtaining unit; a typical pattern determining unit that determines typical image patterns composing the input image on the basis of the images of character strings selected by the character string selection unit; and an identification information assigning unit that assigns the respective determined image patterns determined by the typical pattern determining unit with identification information for identifying image patterns.