Patent ID: 6219461
Filing Date: 2001-04-17
Classification: G01B,G02B

Abstract:
A method for deriving a three-dimensional image from two-dimensional images of a subject, the method comprising:for each of the two-dimensional images, imposing different structured illumination, including a pattern, on the subject;producing the two-dimensional images from the subject under the structured illumination;deriving a focus measurement for each pixel of at least one of the two-dimensional images,deriving focus-based depth measurements from the two-dimensional images, each of the derived focus-based depth measurements being derived from the focus measurements; andfrom the two-dimensional digital images and the depth measurements, deriving the three-dimensional image, whereinthe three-dimensional image includes information about a subject,each of the two dimensional images includes different information about the subject,each instance of imposed structured illumination includes a same pattern having a spatial period, andfor the instances of imposed structured illumination, the respective positions of the pattern relative to the subject differ by a fraction of the spatial period.