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From: brian@sdcsvax.UUCP (Brian Kantor)
Newsgroups: net.analog,net.graphics,net.micro
Subject: Re: Photosensitive device -- suggestions ???
Message-ID: <916@sdcsvax.UUCP>
Date: Thu, 6-Jun-85 11:14:12 EDT
Article-I.D.: sdcsvax.916
Posted: Thu Jun  6 11:14:12 1985
Date-Received: Sun, 9-Jun-85 04:25:17 EDT
References: <2478@decwrl.UUCP>
Reply-To: brian@sdcsvax.UUCP (Brian Kantor)
Organization: UCSD wombat breeding society
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Xref: watmath net.analog:318 net.graphics:813 net.micro:10712

A nifty way to do image-to-printer conversion is to buy one of the cheap
tv scan converters that are made - we picked on up for $350, plugged it
into an S-100 system that was sitting around, added a surplus tv camera,
and now we can take just about any b&w image (photo, magazine, etc) and
digitize it as 256x256x64.

Take the 256 horizontal pixels, and produce 128 pixels (averaging them
is a simple way), and then use them to look up a pattern in a table.  A
few years back in the Siggraph publications there was a table of
densities (I think it was 256 levels, but I don't have it here to look
at) that was achieved on a decwriter by overprinting up to four
characters.

There you have it, a printer picture.  Now just use a film ribbon and
wax paper, and you can iron it onto a T-shirt.

	Brian Kantor	UC San Diego Computer Graphics Lab

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