1. A characteristic image display apparatus comprising a control unit including a central processing unit and a control program, the control program comprising: a characteristics extraction unit configured to divide a captured image into a plurality of blocks and extract a characteristic color from each block; a band-like image creation unit configured to create a band-like image by classifying characteristic colors that are extracted in the blocks into specified color groups and connecting small single-color images in a line according to a set order of the color groups; and a display control unit configured to display a band-like image sequence that is obtained by arranging the plurality of created band-like images.