range sensing by triangulation.
ThenumericalstereocameradevelopedbyAltschuler, Bae, Altschuler, Dijak,
Tamburino, and Woolford projects space-coded grid patterns which are
generated by an electro-optical programmable spatial viii PREFACE light
modulator. Kanade and Fuhrman present a proximity sensor using
multipleLEDswhich areconically arranged. Itcan measurebothdistance
andorientationofanobject'ssurface.