1. A sensor assembly for constructing a hyperacuity approximation of an image, the sensor assembly comprising a plurality of sensor elements positioned in an imaging array, with each sensor element in the imaging array having a defined area of less than one square centimeter for detecting incident radiation to provide a first output representative of total incident radiation intensity on each defined area, and a plurality of radiation detectors, with at least one radiation detector positioned within each defined area of each of the plurality of sensor elements in the imaging array, the at least one radiation detector in each defined area providing a second output approximating an intensity distribution of incident radiation within each of the defined areas of the plurality of sensor elements, with the first and second outputs together used to construct said hyperacuity approximation of the image.