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:
Jul. 06, 2010
Filed:
Apr. 20, 2005
Applicants:
Graham Finlayson, Norwich, GB;
Mark S. Drew, West Vancouver, CA;
Cheng LU, Burnaby, CA;
Inventors:
Assignee:
University of East Anglia, , GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/40 (2006.01); G06K 9/00 (2006.01); G09G 5/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a method for the recovery of an invariant image from a 3-band colour image, information relating to the angle for an 'invariant direction' in a log-chromaticity space is obtained on the basis that the correction projection is that which minimizes entropy in the resulting invariant image. The method is applied to remove shadows from unsourced imagery.