1. An electronic apparatus comprising: a processing unit configured to: extract at least one frame selected from a plurality of frames of moving-picture data as a candidate thumbnail image, wherein the at least one frame corresponds to at least one frame selected according to a plurality of thumbnail extraction criteria; and determine at least one candidate thumbnail image selected from a group comprising candidate thumbnail images obtained by the extracting, as at least one final thumbnail image, according to a thumbnail extraction criterion to which the candidate thumbnail images obtained by the extracting respectively correspond; and a display unit configured to display the at least one final thumbnail image.