COMPARATIVE EFFECTS OF OPTICAL-CORRELATOR SIGNAL-DEPENDENT AND SIGNAL-INDEPENDENT NOISE ON PATTERN-RECOGNITION PERFORMANCE WITH THE PHASE-ONLY FILTER

摘要

The comparative effects of optical-correlator signal-dependent and additive signal-independent noise on correlation-filter performance are analyzed by three different performance measures. For an identical value of the signal-to-noise ratio imposed on each type of noise in a binary input image, computer simulations performed with the phase-only filter show (i) that additive Gaussian signal-independent noise yields a much larger correlation-performance degradation than signal-dependent noise and (ii) that the different types of signal-dependent noise lead to similar correlation results because of similar effects on the input image that are inherent to the nature of the noise. [References: 6]