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

From: Steve Chessin <steve_dot_chessin_at_sun_dot_com>
Date: Fri Apr 30 2004 - 15:53:26 CDT

>From alan@openvotingconsortium.org Fri Apr 30 12:53:54 2004
>From: "Alan Dechert" <alan@openvotingconsortium.org>
>To: <voting-project@lists.sonic.net>
>Subject: Re: [voting-project] How big could a bar code be if a bar code could be big?
>Date: Fri, 30 Apr 2004 12:53:41 -0700

>So, you could increase from 116
>bits to however many more bits you could get from a 36-digit decimal without
>increasing the length of the barcode at all. I'd guess you could go to a
>50-digit decimal number without too much trouble (however many bits that
>works out to be).

#bits ~= 3.32192809488736234789*#digits.

(That magic number is ln(10)/ln(2), or log2(10).)

For example:

36 digits -> ~120 bits
50 digits -> ~166 bits

--Steve
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Received on Fri Apr 30 23:17:27 2004

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