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:
Nov. 21, 2000
Filed:
Feb. 02, 1998
Marcos R Vescovi, Palo Alto, CA (US);
Philippe P Piernot, Palo Alto, CA (US);
Interval Research Corporation, Palo Alto, CA (US);
Abstract
Disclosed is a method of characterizing a coded object having a plurality of regions. A luminosity value of a first region of the coded object is compared to a luminosity value of a second region of the coded object, wherein the second region's color is known. The first region's color is then determined based on the comparison of the first and second region's luminosity values. In one aspect, the second region's color is known to be white. It is determined that the first region's color is white when the first region's luminosity value is not less than the second region's luminosity value by more than a predetermined constant k, and it is determined that the first region's color is black when the first region's luminosity value is less than the second region's luminosity value by more than a predetermined value. Various coded object configurations are also disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile