The measurement or estimation of the resolution (usually tribar) of an Electro-Optical (E-O) system is
complicated primarily by two effects: 1) The phase of the periodic detector array relative to the periodic target bar spacing produces a moire effect in
which the target can appear stronger and weaker.
2) The electronic signal is enhanced in some manner thereby precluding contrast as a limiter of resolution.
The algorithm described in this paper avoids the phase problem by using only the continuous part of the
generated noise, and avoids the contrast problem by using the signal-to-noise ratio as the resolution determining
criterium. The acceptance spectrum of the human eye is used to define both signal and noise. A typical system
with variable parameters is analyzed; the results indicate there are practical limits to the quality required of system