1. A method for extending a visibility area obtained by means of a camera mounted on a vehicle, comprising: a step of generating a basic virtual image (I 2v ) in which a set of pixels of the basic virtual image is correlated with a set of pixels of a real image (I 1R ) captured by the camera while taking into account that the set of pixels of the real image reproduces a planar surface of the real world, a step of characterisation of the basic virtual image (I 2v ) in which a set of points of interest of the basic virtual image (I 2v ) is generated; a step of building a cumulative virtual image (I 3v ) in which at least a portion of the basic virtual image (I 2v ) is superimposed on at least a portion of the cumulative virtual image (I 3v ) while coinciding points of interest of the basic virtual image (I 2v ) with points of interest of the cumulative virtual image (I 3v ).