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:
Jan. 29, 2019
Filed:
Apr. 13, 2017
Applicant:
Research International, Inc., Monroe, WA (US);
Inventor:
Elric Saaski, Monroe, WA (US);
Assignee:
RESEARCH INTERNATIONAL, INC., Monroe, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/62 (2006.01); H04N 5/225 (2006.01); G06T 7/00 (2017.01); G01N 21/77 (2006.01); H04N 5/235 (2006.01);
U.S. Cl.
CPC ...
G06K 9/6215 (2013.01); G01N 21/77 (2013.01); G06T 7/0014 (2013.01); H04N 5/2256 (2013.01); H04N 5/2354 (2013.01); G06T 2207/10024 (2013.01); G06T 2207/30072 (2013.01);
Abstract
When reading a coupon that displays a pattern when a target substance is detected, recognition of the target pattern can be hindered by nonuniform illumination of the coupon. In one aspect, methods and devices are disclosed for uniform illumination of a coupon using a negative axicon lens and a light diffusing assembly. In another separate aspect, methods are disclosed for mathematically compensating for nonuniform illumination of a coupon.