1. A method of determining a set of infrared amplitudes for a set of closely-spaced objects, comprising: receiving an unresolved infrared image of the set of closely-spaced objects; expressing the set of infrared amplitudes as a function of a set of positions of the closely-spaced objects; formulating a set of simultaneous equations at least partially based on the expression between the infrared amplitudes and the set of positions of the closely-spaced objects; and solving the set of simultaneous equations for the set of infrared amplitudes.