1. A data input apparatus, comprising: an image input module to obtain an input image representing at least one selectable input; and a controller to control a binarizing of at least one respective image of at least one respective input from the obtained input image, and to control a determining selection by a user of the at least one respective selectable input based on a comparison of a corresponding binarized image of the at least one respective image with a corresponding previously stored binarized image.