Method and apparatus for brightness equalization of images taken with point source illumination

摘要

A method and apparatus correct for image brightness of images taken of an object with point source illumination in an imaging system. The brightness correction method and apparatus of the present invention correct for the non-object related brightness characteristics of a point source illumination in the observed or measured brightness of a relatively planar object being imaged by the imaging system. The method and apparatus are applicable to imaging and inspection systems used with a wide variety of planar and semi-planar objects including but not limited to X-ray inspection of printed circuit boards (PCBs) and integrated circuits.