PATTERN-RECOGNITION WITH A PHASE-SHIFTING INTERFEROMETRIC CORRELATOR - DISCRIMINATION-CAPABILITY ENHANCEMENT

We study an experimental setup to perform pattern recognition by corre lation methods. This setup implements the Pure Phase Correlation (PPC) method, let us say, it only takes into account the phase distribution s of the Fourier transform of the scene and the target. An experimenta l study of a PPC method is presented. A phase measurement interferomet ric technique is used to extract the phase of the Fourier transform of the correlation function. Some aspects related to the intermodulation are examined. Experimental PPC with improved discrimination capabilit y obtained with binary masks is also considered. The experiments are c arried out with segmented scenes and with multiobject scenes.