21 May
2012
21 May
'12
2:59 p.m.
----- Original Message -----
From: "Ethan Dicks" <ethan.dicks at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Monday, May 21, 2012 14:44
Subject: Re: Software for OCR'ing paper tape? (was: Question about Military
terminal)
> As for paper tape, what about the super-duper
overkill of recognizing
> a video stream from a web cam? All you'd need is a jig to slowly
> pull the tape past the fixed camera.
If I wanted to read a bunch of paper tape, I'd
probably build my own
scanner from 9 photodiodes from the article in Byte magazine.
Hi, from an old reader, I have the sensor assembly. It has 13 LEDs and
photo diodes, arranged in 2 groups of 6, spaced 2.8mm, on both sides of
a central set for the index hole. The latter is appx. 1mm out of line.
The unit is 2" high x 2.26" wide, with a 0.06" slot for the tape.
Output is through 2 74LS240 (Octal tri-state inverting buffers) and
7" of 26 conductor ribbon cable. Weihing only 77g, I'll send it free,
postage paid, to the first guy asking for it.
Greetings, Armin.