Talk:Barcode reader

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needs improvement[edit]

This page still kinda stinks (needs improvement). Sorry I removed so much stuff, but it is better to say nothing at all than to spread egregiously wrong information. I don't have the time right now to fix it.

  plz provide a more information???????????????/  —Preceding unsigned comment added by (talk) 16:41, 13 August 2010 (UTC) 

Level of accuracy on barcode scanners[edit]

The level of accuracy depends on the symbology and quality of the barcode and the decode algorithm that the barcode scanner uses. Most Symbologies have a check digit or checksum that validates the characters in the barcode using a calculation defined in the standard, but there are some like interleaved 2 of 5 that don't that means the scanner cannot perform this check. No check digit is the most common cause of missreads. Barcodes can be checked for quality using a barcode verifier and are graded on the ANSI standard A-F (F for fail). Most scanners will be 95%+ accurate assuming that the barcode is in normal quality. In decoding the barcodes it sometimes contain flaws that allow a miss read on the part of the barcode scanner..

Unanswered questions[edit]

This article doesn't really explain how exactly does a barcode reader read the codes in a barcode. For example, when a user is swiping a handheld barcode reader across a barcode, how exactly is the variations in light reflected back synchronized to the physical width of a bar or white space? If a user's hand does not sweep over the barcode in an absolutely constant speed, wouldn't the data become garbled? If his swiping speed was half while swiping a 1-width bar, it would be decoded as a 2-width bar. If his swiping speed was doubled while sweeping a 2-width bar, the bar would be decoded as a 1-width bar. What is the missing piece of technology that makes barcode readers work? Does anyone know? 12:03, 22 August 2005 (UTC)

They have to assume that the swipe speed is constant, at least over some small distance. This distance is not necessarily the entire bar code, however; the symbology can be designed to make it possible for the reader to resynchronize itself over shorter distances. The problem is similar to that of transmitting serial data over a single wire, with no clock reference (as does a Serdes). 06:56, 21 March 2006 (UTC)
in CCD barcode scanners, the device just "takes a picture". In a laser scanner, the speed at which the laser swipes across the barcode depends on the frequency of the oscillating mirror. So a 1-width bar could give the same response as a 2-width bar at a different distance. However, the barcoding software could be looking at the relative widths of the bars, i.e. whether its a long or short bar. At the near range the device stops reading when the angle subtended by the barcode becomes close to the scanning angle of the laser. At the far working range, the failure to read a barcode is due to factors such as noise, the modulation of the signal, as well as the larger size of the laser spot. The increased frequency of the input signal could also be a factor. --Nathaniel 13:26, 23 March 2006 (UTC)

"SYMBOLOGIES" isn't a real term[edit]

Just a note on the section labelled 'symbologies.' Symbology is a fictional field. You can even do a search on SYMBOLOGY and find this out. The nearest thing to 'symbology' would be symbolism, I think. But the word 'symbolism' doesn't seem to fit the subject matter.

Lamont McCroskey

A "symbology" is a noun. Symbologies are specifications for how to encode data into barcodes. It's a real word that you can find on many barcode-related sites. Jehochman 04:20, 18 January 2006 (UTC)

Barcoding in stock system[edit]

Please can someone advise how a barcoding system can be used within the workplace for stock inventory. Would you scan the barcode and that would then enter the data onto a computer system for reviewal if needed?

A: I can try but just about everything i post gets deleted. here goes. a barcode scanner is nothing more than a very very basic camera of sorts. the idea behind it is only for simple recognition of stock items. all of the work that is actually done is by the software. recording the scan as either coming into inventory count(company purchase), leaving inventory count(sale), or just simply to count inventory on hand. the software stores the date, time, person scanning, amount scanned through any specified period of time, average scanned per day or hour, taxes included in inventory transfer and so on. if you would like more info on the subject, please feel free to check out this link. it goes further into detail about software functions for barcode inventory. —Preceding unsigned comment added by Business solutions pro (talkcontribs) 05:59, 5 March 2010 (UTC)

Reading by yourself[edit]

Is there a way to read bar codes by yourself?

Yes - 99% of the time the number or text the barcode represents is printed directly underneath it! I should think that it's probably possible to learn to literally read a barcode, but I'm guessing it wouldn't be easy, not to mention it being a pointless excersise. TheIslander 15:54, 11 April 2007 (UTC)

Copyright Violation[edit]

Somebody copied a bunch of barcode symbology data from a corporate web site, so I've deleted that. The sybologies are covered in the barcode article so we don't need to duplicate them here in any case. Jehochman (Talk/Contrib) 23:26, 18 December 2006 (UTC)

Types of Connectors[edit]

In this section the phrase " OCIA is sometimes still variety of connector types " is not clear at all. I would correct it to say "OCIA is another interface used in some scanners" and I would say what OCIA stands for, if I knew. —The preceding unsigned comment was added by Ace Frahm (talkcontribs) 03:37, 21 December 2006 (UTC).

"mostly used on older stand alone cash registers with a wide to be built into the terminal that the scanner connects to" is not a phrase with a clear meaning either.

And I believe some of the lastest barcode readers are bluetooth enabled too.


In my opinion the section Barcode Reader Manufacturers could be removed, see WP:NOT#LINK. Erik Warmelink 13:03, 8 May 2007 (UTC)

Agreed, and done. WLU 04:00, 18 September 2007 (UTC)
i disagree. i think they should be kept separate but still allowed. alot of subjects are difficult to lear nabout through just one simple wiki article and outside refrences are much needed for the reader. wikipedia is a signifigant online learning source for subjects not typically found in traditional encyclopedias, such as jargon related to specific industries, newer technology, cutting edge consumer products. if wikipedia does not allow external links to related material wikipedia will slowly lose it's reputation for defining where no other enciclopedia dares to define. I say allow it, but only where it aids in the learning process. Business solutions pro (talk) 06:10, 5 March 2010 (UTC)

Historical information[edit]

Needs more. 22:26, 7 August 2007 (UTC)

good luck. i dare anyone to try and explain the barcode systems inventors and innovators. that would be a great long article filled with corporation names. that would never pass the scruteny of the allmighty wikipedia admistrative "backspace button" masters. Business solutions pro (talk) 06:17, 5 March 2010 (UTC)