Method and apparatus for detecting and decoding bar code symbols using two-dimensional digital pixel images

Patent 5343028 Issued on August 30, 1994. Estimated Expiration Date:

August 10, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Technique for reading bar codes
Patent #: 4873426
Issued on: 10/10/1989
Inventor: Sarna, et al.

Barcode location determination
Patent #: 4948955
Issued on: 08/14/1990
Inventor: Lee, et al.

Bar code locator for video scanner/reader system
Patent #: 4958064
Issued on: 09/18/1990
Inventor: Kirkpatrick

Bar code reading method
Patent #: 4973829
Issued on: 11/27/1990
Inventor: Ishida, et al.

Bar code reader
Patent #: 4988852
Issued on: 01/29/1991
Inventor: Krishnan

Method and apparatus for barcode recognition in a digital image
Patent #: 4992650
Issued on: 02/12/1991
Inventor: Somerville

Bar code reading and decoding apparatus
Patent #: 5036182
Issued on: 07/30/1991
Inventor: Ouchi, et al.

Combining bar code read data from a plurality of scanning lines formed from one-dimensional images
Patent #: 5045677
Issued on: 09/03/1991
Inventor: Okamura

Bar code location and recognition processing system
Patent #: 5073954
Issued on: 12/17/1991
Inventor: Van Tyne, et al.

Bar code reading apparatus
Patent #: 5077463
Issued on: 12/31/1991
Inventor: Sato

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Inventors

Application

No. 927910 filed on 08/10/1992

US Classes:

235/462.092-D bar code

Examiners

Primary: Willis, Davis L.
Assistant: Frech, Karl D.

Attorney, Agent or Firm

Mendelsohn; Steve, Golub; Daniel H., Murray; William H.

Foreign Patent References

0449634 EP. 10/13/1991
0449645 EP. 10/13/1991
0450878 EP. 10/13/1991

International Class

G06K 007/10

Abstract

A system for detecting a bar code symbol receives a two-dimensional image containing the symbol, where the system has no a priori knowledge of the orientation of the symbol in the image. The system scans the image in one dimension to locate a quiet zone for the symbol and searches the image in one dimension to identify a start/stop character of the symbol.