A global shape from shading algorithm which develops a technique to me
rge local shape from shading results obtained around singular points i
nto the complete shape using the mountaineers theorem was recently pre
sented in Kimmel and Bruckstein (1995). In this comment, we enhance th
is result by proving the completeness and uniqueness obtained by the g
lobal shape from shading algorithm. (C) 1996 Academic Press, Inc.