Patent ID: 7098999

Claim:
A system for receiving a signal from a scene comprising: first means for detecting said signal and providing a detected signal in response thereto, said first means including an array of said detectors and said detected signal having a pulse therein; second means for computing pulse time of arrival and/or pulse intensity based on a first time at which a rising edge of said pulse crosses a first threshold and a second time at which a falling edge of said pulse crosses a second threshold, said first threshold and said second threshold being the same threshold value; and third means for generating an image based on said second signal; said second means including: fourth means for timing when said rising edge of said pulse passes said first threshold and when said falling edge of said pulse passes a second threshold and providing said first and second times in response thereto and fifth means for computing pulse centroid based on said first and second times, said fourth means including: a threshold-crossing comparator that receives said threshold value and said detected signal as input and provides a digital signal as output in response thereto and sixth means for generating thresholds adapted to each detector in said array of detectors, said sixth means employing a global threshold associated with all detectors in said array of detectors and providing an individual threshold adjustment to said global threshold so that each detector is associated with a threshold adapted to that detector.