THUMBNAIL EXTRACTION PROGRAM AND THUMBNAIL EXTRACTION METHOD

PROBLEM TO BE SOLVED: To provide a thumbnail extraction program and a thumbnail extraction method that are capable of extracting a thumbnail suitable for three-dimensional video.SOLUTION: A thumbnail extraction program causes a computer to execute processing for: extracting feature points corresponding between a frame image pair constituting one frame of 3D video from the frame image pair as a feature point pair; calculating a depth amount of the feature point pair based on a distance between points of the feature point pair, a distance between lenses, and a focal length, and clustering the feature point pair using the depth amount; evaluating stereoscopic visibility of one or more frame image pairs from clustering result information of the one or more frame image pairs on the basis of a predetermined evaluation condition of stereoscopic visibility of a frame image pair based on clustering result information; and extracting a pair of the frame image with the most excellent evaluation result as a pair of the frame image for a thumbnail based on the evaluation result of stereoscopic visibility.