To provide a noise eliminating apparatus and the like that can eliminate an atypical shaped background noise. A character noise eliminating apparatus includes a character noise area detecting device for detecting a character noise area which is an area corresponding to a character noise from an image, a density conversion area layer determining device for setting a plurality of density conversion area layers inside and outside the character noise area, and a density converting device for setting a neighboring pixel group within the same density conversion area layer as the density conversion area layer to which a target pixel belongs as a reference area of the target pixel, with respect to pixels in the density conversion area layers, and generating a density converted image applying a local image enhancement.