Abstract: Described is a method for helping a person to select a furnishing covering surface, comprising the following steps: self-localizing without markers an image acquisition device 2, for determining a pose of the image acquisition device 2; identifying, in at least one image acquired by the image acquisition device 2, a portion of image corresponding to a pre-existing surface to be substituted; segmenting, in one or more images acquired by the image acquisition device 2, at least the portion of image identified; selecting, using a menu displayed on a display 5, a type of furnishing covering surface with which to replace the portion of image previously identified; generating at least one image in which the portion of image is substituted with the type of furnishing covering surface previously selected.