1. A character recognition result verification apparatus, comprising: a group generation section generating a group including a plurality of character images recognized as the same character from a document image including a plurality of character images; and a verification image generation section generating a verification image including a first region and a second region by superimposing the plurality of character images included in the generated group, wherein the first region corresponds to a pixel having the same pixel value in all of the plurality of character images and the second region corresponds to a pixel having the same pixel value in a part of the plurality of character images.