Two dimensional code reading apparatus

Details Two dimensional code reading apparatus Two dimensional code reading apparatus

1995-12-26

1997-11-25

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235494, G06K 710

Patent

active

056915276

ABSTRACT:
A two-dimensional code reading apparatus including a CCD sensor that captures an image including a two-dimensional code attached on an article being conveyed, for example. The two-dimensional code is formed as a matrix of light and dark cells, and includes at least two orientation symbols at corners of the matrix. Each of the orientation symbols is geometrically defined so that when a scanning line signal of the CCD sensor is binary-coded into a sequence of scanning line pulse signals, they show a given frequency component ratio. The two-dimensional code reading apparatus identifies an orientation of the orientation symbols based on positions of the pulse signals showing the given frequency component ratio in the captured image to determine positions of data cells in a data field of the two-dimensional code adjacent to the orientation symbols for decoding code information indicated by the data cells.

REFERENCES:
patent: 3074634 (1963-01-01), Gamo
patent: 3801775 (1974-04-01), Acker
patent: 4736109 (1988-04-01), Dvorzsak
patent: 4760247 (1988-07-01), Keane et al.
patent: 4924078 (1990-05-01), Santanselmo et al.
patent: 5053609 (1991-10-01), Priddy et al.
patent: 5103489 (1992-04-01), Miette
patent: 5288986 (1994-02-01), Pine et al.
patent: 5291564 (1994-03-01), Shah et al.
patent: 5308960 (1994-05-01), Smith et al.
patent: 5343031 (1994-08-01), Yoshida
patent: 5410620 (1995-04-01), Yoshida
patent: 5515447 (1996-05-01), Zheng et al.
patent: 5541396 (1996-07-01), Rentsch

Affiliated with

Also associated with

Rating

Two dimensional code reading apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two dimensional code reading apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two dimensional code reading apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2108911