Re: How big could a bar code be if a bar codecouldbe big?

From: Alan Dechert <alan_at_openvotingconsortium_dot_org>
Date: Fri Apr 30 2004 - 20:23:35 CDT

Karl,

> My own personal scaling alarms begin to tingle when I get to 10% of the
> maximum. Given that our demo, even without a digital signature/message
> digest and ECC is running at 80% usage of a 30 symbol EAN128C bar code my
> scaling alarms are in full alert mode.
>
I'm not sure of these calculations and I'm not sure compression could not be
used effectively.

As I understand it, we have a pair of digits for each symbol in char set C.
So the data uses 20 symbols (40 digits). There are another couple of
symbols for this and that. Jan could give more details.

> I did a quick web search of commercial bar-scanners and many of 'em now do
> both 1d and 2d. So far my highly non-scientific search indicates PDF417
> to be perhaps most widely supported. That survey has a confidence range
> on the order of +/- 150%
>
> By-the-way, USB cue-cats seem to work just fine, err, well, uh, let me
> revise that to say that they work just as "fine" as keyboard port cue cats
> normally do.
>
When did you get one? Have you run all the way through the BRP with it?

Alan D.
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Received on Fri Apr 30 23:17:28 2004

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