Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.3 alpha 4/3/85; site ukma.UUCP
Path: utzoo!watmath!clyde!cbosgd!ukma!david
From: david@ukma.UUCP (David Herron, NPR Lover)
Newsgroups: net.graphics
Subject: Re: Solarization and Posterization
Message-ID: <2227@ukma.UUCP>
Date: Sun, 22-Sep-85 13:10:37 EDT
Article-I.D.: ukma.2227
Posted: Sun Sep 22 13:10:37 1985
Date-Received: Tue, 24-Sep-85 03:11:57 EDT
References: <6700033@datacube.UUCP>
Reply-To: david@ukma.UUCP (David Herron, NPR Lover)
Organization: Univ. of KY Mathematical Sciences
Lines: 31

In article <6700033@datacube.UUCP> shep@datacube.UUCP writes:
>I believe solarization came from the photographic effect of exposing
>emulsion to light sometime during development. 
>I have no idea where the term posterization came from.

Yes.  Solarization is a photographic effect created while developing
a print.  You simply turn on the lights halfway through the development.
It turns the light areas in the picture dark, *except* for a band
around any dark objects.

Obviously, there's some undeveloped silver left in these light areas,
which get exposed letting them turn dark.  Now that I think about it,
there'd be some interesting effects by doing the same thing with
negatives.

I'm unsure why the band around dark objects doesn't get exposed though.

I recall "posterization" vaguely in the same context.  Like, maybe it
is a more technical/specific term for the same thing, y'know, one of
those things where everybody calls it one thing but it's really something
else.  Actually, I remember somebody telling me that the thing I called
solarization was really something else (posterization?  might be where
the "post" prefix came from, because it's a form of "post-processing").
And, some other technique was *really* solarization.
-- 
--- David Herron
--- ARPA-> ukma!david@ANL-MCS.ARPA
--- UUCP-> {ucbvax,unmvax,boulder,oddjob}!anlams!ukma!david
---        {ihnp4,decvax,ucbvax}!cbosgd!ukma!david

Hackin's in me blood.  My mother was known as Miss Hacker before she married!


Brought to you by Super Global Mega Corp .com