Abstract: The invention concerns a method for making a presentation comprising,—sending (202} an image of the presentation to be displayed on a screen (101), in particular to a display device (100) and via a network device (108),—while the image is displayed, receiving (203, 204) from a pointing device (110) information about the alignment of the pointing device (110) relative to the screen (101),—determining (205, 206, 212) a predetermined action to be performed depending on the information received, and—sending (208) the result of the predetermined action, in particular to the display device (100) and via the network device (108).

Abstract: Gesture recognition is performed by receiving a video frame from a camera, drawing a scribble pointing out one element within the video frame, tracking the scribble across subsequent frames by propagating the scribble on the remainder of the video, aggregating related scribbles determined by tracking the scribble, attaching a tag to the aggregated related scribbles to form a gesture model, and comparing a current scribble with the stored gesture model.