1. A method for enhancing contrast resolution of an imaging or sensing system, comprising: receiving information from an array of transducers using multiple data channels; digitally filtering the received information on the multiple data channels using respective finite impulse response (FIR) filters corresponding to respective data channels, the FIR filters having multiple taps, the taps including tap weights determined (1) as a function of a distance of the array from an object that energy is being transmitted to or reflected from, and (2) corresponding to an a priori system model; and aggregating outputs of the finite impulse response filters to provide a sample.