We analyze the influence of different optical coding methods of the input image in optical correlators. The noise robustness and the optical efficiency of the correlator are investigated. We show in particular that the signal-to-noise ratio is greatly dependent on the coding method. It decreases drastically for large phase modulation.
© 1994 Optical Society of America
S. Maze and Ph. Réfrégier, "Optical correlation: influence of the coding of the input image," Appl. Opt. 33, 6788-6796 (1994)