Abstract: A multifunction printer, which generates first image data of a document by reading the document, generates second image data in which a background color of the document is removed by conducting a color conversion process to the first image data, and prints an image based on the second image data, has a background color density computing section which computes background color density of the document from the first image data, a color conversion table generating section which generates a first color conversion table and a second color conversion table based on the background color density, and an image processing section which separates an image shown by the first image data into a letter region and a non-letter region, converts the color by applying the first color conversion table to the letter region, and converts the color by applying the second color conversion table to the non-letter region.