6. Device according to claim 4 , wherein said means to select a reduced sub-space out of said semantic information sub-space are intended to modify said predetermined criterion upon interaction of a user.
6. Device according to claim 4 , wherein said means to select a reduced sub-space out of said semantic information sub-space are intended to modify said predetermined criterion upon interaction of a user. 8. Device according to claim 6 wherein the user interaction consists in selecting at least one of the images of the initial set of images and in that the means are intended to select a reduced sub-space represented by the semantic information associated with the initial set of images minus the semantic information associated with the selected images.