opencv_stitching is a beta version of new application that makes a panorama out of a set of photos which were took from the same point. Usage opencv_stitching img1 img2 [...imgN] [flags] Flags: --preview Run stitching in the preview mode. Works faster than usual mode, but output image will have lower resolution. --try_gpu (yes|no) Try to use GPU. The default value is 'no'. All default values are