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:
Dec. 05, 2006
Filed:
Nov. 27, 2002
Tsutomu Nakazawa, Isesaki, JP;
Kouichi Hamakawa, Ojima-Machi, JP;
Youji Takei, Kounosu, JP;
Masanobu Kiyama, Ota, JP;
Tsutomu Nakazawa, Isesaki, JP;
Kouichi Hamakawa, Ojima-Machi, JP;
Youji Takei, Kounosu, JP;
Masanobu Kiyama, Ota, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A two-dimensional bar code printed on a piece of paper is photographed by the area sensor. A reading method of this bar code includes a process for correcting the distortion of the image of the two-dimensional bar code obtained from the area sensor by the projection transform, a process for correcting bright spots appearing in the image, and a process for decoding the two-dimensional bar code based on the image data of the two-dimensional bar code corrected by the two processes. This invention enables size-reduction of the reading device of the two-dimensional bar code and also achieves a higher reading speed of the reading device.