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Bar Code

Ali Rizwan
100+
P: 927
Hi all,
I want to make a programe which reads a bar code and also create bar codes(Optional).
Input is taken from bar code scanner and may be the simple scanner.
In case of simple scanner programe has to crop the bar code area automatically or take that area without cropping that.

Thanx

>>> ALI <<<
Jan 8 '08 #1
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6 Replies


werks
100+
P: 220
Hi all,
I want to make a programe which reads a bar code and also create bar codes(Optional).
Input is taken from bar code scanner and may be the simple scanner.
In case of simple scanner programe has to crop the bar code area automatically or take that area without cropping that.

Thanx

>>> ALI <<<
I alos want to know how barcode works.. Hope somebody will post


Better Than Yesterday (-.-)
Jan 9 '08 #2

Expert 5K+
P: 8,434
I thought the driver software for a barcode reader normally just passes in a number, as though the user typed the number.

As for creating them, that has been covered here before - try the search box. But I think you have to buy a barcode font.
Jan 9 '08 #3

debasisdas
Expert 5K+
P: 8,127
To create barcode, you must have barcode fonts.

Try to use C39 or C 128 to generate the code.

Since these accept only string parameters you have to convert numbers to string before passing.
Jan 9 '08 #4

lotus18
100+
P: 866
You can also create barcode fonts in CorelDraw. : )

Rey Sean
Jan 9 '08 #5

Expert 5K+
P: 8,434
To create barcode, you must have barcode fonts.
Try to use C39 or C 128 to generate the code.
Since these accept only string parameters you have to convert numbers to string before passing.
Can you explain what you mean about passing parameters to a font? I wasn't aware you could execute them at all.
Jan 10 '08 #6

idautomation
P: 1
Can you explain what you mean about passing parameters to a font? I wasn't aware you could execute them at all.
You can not simply apply the font to the data that you would like to barcode. The data must be formatted specifically (called 'encoding') to meet the requirements set forth by the standards organizations that produce the specifications for each barcode type (called a 'symbology'). This formatting includes the addition of start and stop characters to the data, the calculation and appendage of a check digit to the data, and proper formatting of the data itself. The start and stop characters are necessary so that barcode scanner does not try to scan from an arbitrary point in the barcode. The check digit allows the scanner to ensure that it has read the data correctly. And, the data needs to be formatted to ensure unique bar space patterns for each character and, in some cases, compress the data.
Feb 20 '08 #7

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