For an interesting anecdote tangentially relating to this issue see CACM Vol9 No.1 (Jan 1966).  In the letters section (p.35) there's a note entitled "On the confusion Between "0" and "O"' ,describing a 'technique' used at NASA's Lewis Research Center.  For the sake of the space programme (or what's left of it) I hope the 'technique' described has been discontinued!

At 12:51 23/05/2002 +0000, Derek M Jones wrote:
All,

Does anybody know of any study that has investigated
the visual similarity of computer language punctuators
and operators?  For instance, how visually similar is ( to
O and l, and so on...

The studies by Kuennapas ("Visual perception of capital letters"
and "Multidimensional similarity of letters") deal with upper
and lower case letters (Swedish) only.

The OCR literature treats it as a machine learning issue.  The
Kuennapas studies asked people for their views on the visual
similarity.  Perhaps these should deliver the same final result,
but I am not convinced.

derek

--
Derek M Jones                                           tel: +44 (0) 1252 520 667
Knowledge Software Ltd                            mailto:[EMAIL PROTECTED]
Applications Standards Conformance Testing   http://www.knosof.co.uk



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