The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 1987
Filed:
Oct. 15, 1984
Applicant:
Inventors:
Brian A Wandell, Palo Alto, CA (US);
Laurence T Maloney, East Palo Alto, CA (US);
Assignee:
The Board of Trustees of the Leland Stanford Junior University, Stanford, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01J / ; G01N / ;
U.S. Cl.
CPC ...
364526 ; 356402 ;
Abstract
A method is disclosed to separate the effect of the ambient lighting from the effects of surface reflectance to better analyze the surface properties of materials. The method uses the data sensed by N+1 sensor classes to define a finite dimensional approximation of a surface reflectance function at each image point, and a finite dimensional approximation of the ambient light. The ambient light reflected from a surface will cause a strength of response in the k.sup.th class of sensor, at position x, according to the formula