The invention relates to a device (DS), for superimposing known patterns,characteristic of a region, on (real) images of said region. The device (D)comprises, a memory (21) in which patterns are stored, which arerepresentative ofa selected region, of known position and orientation with relation to a commonreference and processing means (22), for determining a pattern representativeofthe selected portion in the memory (21), on receipt of the designation of atleastone portion of an observed image of the selected region, taken at a selectedangleand at least one representative attribute of said region, taking account oftheattribute selected, then superimposing the determined pattern on the selectedportion of the image taking account of the selected angle.
