Nonlinearity effects in the pure phase correlation method in multiobject scenes

Turon F., Ahouzi E., Campos J., Chalasinska-Macukow K., Yzuel M.J.

Applied Optics

33(11), 1994, 2188 - 2191, 10.1364/AO.33.002188

The nonlinearity used in the pure phase correlation method can improve pattern recognition, but it causes high-order harmonics in the correlation plane in the case of multiobject scenes. High-order harmonics and the presence of aliasing may cause false alarms. We show that these effects are strongly diminished when the periodicity in the scene is broken (by different objects, random distribution, etc.).