US4175693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for enhancing the reliability of output data from a label reader
Assignee: Shinko Electric Co Ltd
•
Filing: 1978-03-29
•
Granted: 1979-11-27
•
Expires: 1998-03-29
Abstract
Abstract A method for enhancing the reliability of output data from a label reader adapted to read a bar code consisting of a plurality of bars. Each bar in the bar code is scanned at a plurality of points and sets of binary symbols representative of the scanned points along each bar are obtained. Two sums are then formed for each bar, the first being the number of binary "1"s in the set and the second being the number of binary "0"s in the set, and the ratio of two sums is computed. If the ratio is larger than (1+α) for α>0, then the data corresponding to the numerator sum is regarded as reliable. If the ratio is less than (1-β) for 0<β<1, then the data corresponding to the denominator sum is regarded as reliable. If the ratio is equal to or larger than (1-β) but equal to or less than (1+α), then the data is regarded as unreliable.
Inventors
- 👤 Sadao Nakanishi
- 👤 Kazuhiro Suzuki
- 👤 Nobufumi Tokura
- 👤 Shinichiro Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:01
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10861; G06K5/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A method for enhancing the reliability of the output data from a label reader having a scanner and adapted to read a bar code consisting of a plurality of bars comprising the steps of: obtaining a set of binary signals, each signal in said set being representative of a particular different point along a particular bar as scanned by the scanner; forming a first sum equal to the number of binary "1" signals in said set; forming a second sum equal to the number of binary "0" signals in said set; computing the ratio (R) of said first sum to said second sum; providing a binary "1" output decision for the particular bar if R>(1+α) where α>0; providing a binary "0" output decision for the particular bar if R>(1-β) where 0<β<1; and determining that a reliable output decision cannot be made for the particular bar if (1-β)≦R≦(1+α).
Claim 2
Independent Claim
147 words
A method for enhancing the reliability of the output data from a label reader having a scanner and adapted to read a bar code consisting of a plurality of bars comprising the steps of: obtaining a set of binary signals, each signal in said set being representative of a particular different point along a particular bar as scanned by the scanner; forming a first sum equal to the number of binary "1" signals in said set; forming a second sum equal to the number of binary "0" signals in said set; computing the ratio (R) of said first sum to said second sum; providing a binary "1" output decision for the particular bar if R>(1+α) where α>0; providing a binary "0" output decision for the particular bar if R>(1-β) where 0<β<1; and determining that a reliable output decision cannot be made for the particular bar if (1-β)≦R≦(1+α).
Claim 3
Dependent Claim
22 words
The method according to claim 1 wherein the bars comprising said bar code comprise a mix of wide bars and narrow bars.
Claim 4
Dependent Claim
47 words
The method according to claim 2 wherein a plurality of binary "1" signals are obtained for said set if the particular bar is a wide bar; and wherein a plurality of binary "0" signals are obtained for said set if the particular bar is a narrow bar.
Claim 5
Dependent Claim
47 words
The method according to claim 2 wherein a plurality of binary "1" signals are obtained for said set if the particular bar is a narrow bar, and wherein a plurality of binary "0" signals are obtained for said set if the particular bar is a wide bar.
References Cited (Backward Citations)
US3806706A
Cited
US3588457A
Cited
US3744026A
Cited
US3818191A
Cited
US3818444A
Cited
US3882464A
Cited
US4044227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |