Patent ID: 7834921

Claim:
A method for modifying an image of an optical field incident on a photo-sensor, comprising: at a first rate, receiving from the photo-sensor a signal for the image formed from a two-dimensional array of pixels that are outputted from a plurality of photo-detectors of the photo-sensor imaging the optical field; calculating a distance of each pixel from at least one particular point within the image, based on a position of each pixel in the two-dimensional array of pixels; determining a modification factor for each pixel based at least on its calculated distance and on at least two independently determined intensity distribution patterns that are attributable to separate phenomena, each pattern characterized by at least one stored set of points and each determined through a separate calibration of the photo-sensor imaging a uniform intensity optical field under a particular procedure; modifying an intensity of each pixel based at least on its determined modification factor, at a second rate that is at least as fast as the first rate; and outputting a modified image that is formed from the modified pixels.