[Moved] how to generate Barcodes for laser barcode reader..??

[Chethan Chethu]

*How to generate barcodes for a laser barcode reader..??
*we are working on a project "intelligent cart" which performs automatic billing, so we need decipher the barcode and display required data.. some one plzz help us out in reading the information contained in barcode and also to generate it.. :?::?:

 

[FvM]

See https://en.wikipedia.org/wiki/Barcode, with various continuing links.

 

[Chethan Chethu]

How to read barcode output..??

Usually in barcode reader, it has a scanner that scans the 59 alternate black and white lines and translates it into 12digits as per UPC and also a decode block after scanner rite.. since i'm a newbie in barcode reader, so can any one tell me how to find the scanner output(12 digits) and the final decoder output or the barcode reader output..

 

[D.A.(Tony)Stewart]

3-9 bar code can be installed into your FONT folder and used by any application such as a DOC MDB or XLS file or even a webscript. It is not free.


(snip)
NOTE:
The exclamation character (!) or the asterisk (*) must be included before and after the data in each barcode symbol. This is referred to as the Start/Stop character.

For example:
To create a barcode that encodes the data "1234" with the Code 39 Font:
(1) select the font from the list of fonts;
(2) type the start character, which is "*";
(3) type the data, which is "1234";
(4) type the stop character, which is "*"; and
(5) then change the font back to the default font.

The parentheses () may be used instead of “!” or “*” as the start/stop character to eliminate the “*” from appearing in the human readable version of the fonts.

The free font is only available in the "M" size with human-readable text. The purchased version contains several other sizes in standard, human-readable, standard extended, and human-readable extended versions. The extended version of the purchased product also supports encoding of lowercase characters. To purchase, visit:
https://www.idautomation.com/barcode-fonts/code-39/

 

[Chethan Chethu]

i get sunny, but can u just tell me how do they encode it into barcode lines and then 12digits or how do we decode or decipher it..??

 

[D.A.(Tony)Stewart]

Encoding is just a FONT table using the file in your FONTS library and selecting the FONT in any application that can choose fonts.

Decoding with a bar code reader requires the Ruleset for that code and demodulating the pulse widths to ascii characters with some analog hardware to provide the optical reflection signals and conditioning. Like any ASCII serial port it has a start bit sequence and stop bit sequence, except it can be scanned in either direction.

 

[Tunelabguy]

Encoding is just a FONT table using the file in your FONTS library and selecting the FONT in any application that can choose fonts..

That is just one way of generating bar codes within the context of a text-processing program. Barcodes can also be generated by dedicated software that makes no use of any fonts, but just uses the graphical interface to draw the barcodes from scratch, using the encoding rules in the cited Wikipedia reference.

 

[Chethan Chethu]

ohk, i got it sunny, but one final question how can we find a ruleset for decoding or will it be available anywhere or should i write a new rule set..??