NONZERO-ORDER JOINT TRANSFORM CORRELATOR

A simple method of removing the zero order in a joint transform power spectrum, i.e., using the nonzero-order joint transform power spectrum (NOJTPS), is discussed. We show that the nonzero-order joint transfor m correlator (NOJTC) performs better than the conventional joint trans form correlator (CJTC). In short, the NOJTC offers high detection effi ciency, better input pixel utilization, and avoidance of false alarms due to multitarget intermodulation. Simulated and experimental demonst rations are provided. (C) 1998 Society of Photo-Optical Instrumentatio n Engineers. [S0091-3286(98)01601-8].