An occupant sensor incorporates a 3-D imaging system that acquires a 3-D image
of an object. The image is segmented to remove unwanted portions and to identify
a region-of-interest, and the content thereof is classified responsive to a plurality
of 3-D features. In one embodiment, the 3-D image is transformed to a second 3-D
image from a second viewing perspective. A two-dimensional projection of the second
3-D image is classified, and a presence, size and position of occupant can be identified
from features thereof. A safety restraint system is controlled responsive to the
detected scenario, including the presence, position and size of an occupant.