Re: Barcodes no longer scan

From: mao (NoSpam)
Date: 10/21/04 

Date: Thu, 21 Oct 2004 16:46:56 -0400

This is my theory. XP is probably producing a more acurate calculation when
calculating the bar widths for the bars in the barcodes. This may be
resulting in a different read. We had a customer that could print a barcode
using one driver and the barcode would read but when using another driver it
did not read. In this case the one that read was a driver for a 200 dpi
printer and the one that did not read was a driver for a 203dpi printer.
After examining the barcodes, the one printed at 203dpi had some narrow bars
that were faint an therefore did not read well. By changing the resolution
of the 203 dpi to 200 dpi, the problem was fixed. However you do lose a
couple of dots across the width of the page due to the printer resolution
was still 203dpi. This only seems to be an issue with lower resolution
devices.

"MikeH" <MikeH@discussions.microsoft.com> wrote in message
news:B79C6E6B-F64A-45BF-908B-148BCEF5D21E@microsoft.com...
> We use Visual Manufacturing which produces some reports with embedded
> barcodes. Since upgrading some clients to new Xp machines, the barcodes
still
> print, but are no longer readable by the scanners we use. The reports and
> printers are exactly the same as before, indeed we are Ok if we print from
98
> or 2000 machines,. The problem being we are upgrading all clients to XP
and
> need a solution.

Relevant Pages

  • Re: Extract en recognize barcode from image file.
    ... I've been working on recognizing EAN barcodes from images. ... Average of several lines for the color of the bars ... For the pictures, remove .th in the links to have real size pictures ...
    (comp.lang.c)
  • [OpenCV] Extract en recognize barcode from image file.
    ... I've been working on recognizing EAN barcodes from images. ... digit with the help of OCR software but with "Open Computer Vision ... Average of several lines for the color of the bars ...
    (comp.lang.c)
  • Re: [OpenCV] Extract en recognize barcode from image file.
    ... about recognizing barcodes from images but from bars not from the ... Then, I have problems with some barcodes with some reflections, some ... bars won't be continue bars so ... ...
    (comp.lang.c)
  • Re: Postal Barcode /MainFrame Cobol
    ... Windows that will generate POSTNET barcodes. ... Specific combinations of two full bars and three half bars ... represent digits 0 thru 9. ... The POSTNET bar code always begins and ends with a frame bar (Full or tall ...
    (comp.lang.cobol)
  • Re: Barcodes no longer scan
    ... > calculating the bar widths for the bars in the barcodes. ... > using one driver and the barcode would read but when using another driver it ... > couple of dots across the width of the page due to the printer resolution ...
    (microsoft.public.windowsxp.print_fax)
Loading