Patent ID: 6025905
Filing Date: 2000-02-15
Classification: G01N

Abstract:
A method for forming a uniform-illumination reflectance image of an object in a system employing periodic structured illumination, the uniform-illumination reflectance image being characterized by both substantial geometric correspondence and substantial photometric correspondence with at least one captured periodic structured illumination image, the method comprising the steps of:capturing a first periodic structured illumination image of the object to provide a first captured periodic structured illumination image characterized by a period and a first phase;capturing a second periodic structured illumination image of the object to provide a second captured periodic structured illumination image characterized by a second phase and by a period that is substantially identical to the period of the first captured periodic structured illumination image; andcombining at least the first captured periodic structured illumination image with the second captured periodic structured illumination image so as to provide a substantially uniform-illumination reflectance image characterized by both substantial geometric correspondence with at least one of the captured periodic structured illumination images, and substantial photometric correspondence with said at least one of the captured periodic structured illumination images.