We consider the detection of candidate objects (regions of interest) i
n a scene containing high clutter, multiple objects in different class
es, independent of aspect view. with hot, cold, bimodal, and partial o
bject variations and with high and low contrast targets. We use three
different filters with each designed to produce high probability of de
tection (P(D)). We fuse the results from different outputs to reduce t
he probability of false alarms (P(FA)). All filters are realizable on
an optical correlator.