Auclair Fortier, Marie-Flavie 
  
(c) (d) 
Figure 2: a) Original image (217 x 295) with vectors from the road database. b) Junctions (threshold is 0. 1) and extremities 
(black squares). White squares are matched junctions (N,, = 13). c) Initialization of snakes after re-localization. d) Final 
result (@ = 100 and 8 - 4). 
  
96 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000.