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:
Feb. 11, 2003
Filed:
May. 17, 2000
Applicant:
Inventor:
Gregory Rombola, Spencerport, NY (US);
Assignee:
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V 8/00 ;
U.S. Cl.
CPC ...
G01V 8/00 ;
Abstract
Computation of digital gains and offsets used in digital scanners for shading correction (linearity correction) is particularly vulnerable to imperfections in the reference strips, particularly the light reference strip. It is extremely difficult and expensive to create references which are completely free of imperfections or contaminated in some way. This invention eliminates artifacts caused by the presence of small imperfections on the references. It does so by detecting the presence of an artifact and then excluding data contributed by the artifact from the calibration computation process.