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:
Mar. 17, 2009
Filed:
Jul. 20, 2004
Takeshi Matushima, Kariya, JP;
Motoaki Watabe, Aichi-ken, JP;
Takeshi Matushima, Kariya, JP;
Motoaki Watabe, Aichi-ken, JP;
Denso Wave Incorporated, Tokyo, JP;
Abstract
A guide light indicating a rectangular reading portion, smaller than an imaging visual field of an area sensor, is irradiated on a reading objective. A control unit, under the irradiated guide light, causes the area sensor to capture a first image. Then, the control unit detects the position of the guide light based on captured first image data. Then, with no irradiation of the guide light, the control unit causes the area sensor to capture a second image. The control unit then estimates an existing region of a two-dimensional code in the second image. The control unit selects, as a processing objective, only a code that is completely contained in the reading portion and executes the decode processing only for the selected code. When failed in a reading operation, the control unit expands a processing objective region and executes the decode processing again.