Provided is a construction machine which comprises an upper slewing body including: a frame bottom plate formed with an downward opening; an undercover detachably attached to the frame bottom plate to close up the opening; and a connection member for connecting the undercover to the frame bottom plate. The substrate includes a butting edge extending in a first direction along the substrate. Post processing places such a motion graphic within the processed video in such a way that it appears to be part of the original scene.