Device and method for superimposing patterns on images in real-time, particularly for guiding by localisation

A device (DS) is dedicated to the real-time registration of known patterns, characteristic of a region, on (real) images of this region. This device (D) comprises, on the one hand, a memory (21) in which are stored patterns representative of portions of a selected region and of known position and orientation with respect to a common frame of reference, and other charged processing means (22), when they receive the designation of at least one observation image portion of the selected region, taken at a selected angle, and at least one representative attribute of that region. portion, determining in the memory (21) a pattern representative of the designated portion, taking into account the designated attribute, and then resetting the determined pattern on the portion of