RE: Profile editing
RE: Profile editing
- Subject: RE: Profile editing
- From: "Richard Corbett" <email@hidden>
- Date: Fri, 4 Nov 2005 00:39:58 -0000
-----Original Message-----
From: colorsync-users-bounces+richard=email@hidden
[mailto:colorsync-users-bounces+richard=email@hidden]
On Behalf Of daniel westcott
Sent: 03 November 2005 23:53
To: David Clark; email@hidden
Subject: Re: Profile editing
Let me take this opportunity to pay homage to Dr. Hell and all that he gave
us in his lifetime.
-----------------------------------------------
I do believe that your out of line on that one.
All the early drum scanner development for the litho industry was carried
out by Crosfield Electronics lead by that companies MD John Crosfield.
Hell's scanners were primarily produced for the gravure industry and
therefore output to continuous tome material at same size, which meant that
most scanned material consisted of duplicate pages pre-made-up to final
size.
The Crosfield organisation produced the first Drum scanner to enlarge and
reduce in a single step and that output screened final size separations for
the litho industry using original transparency and negative materials.
They also produced the first real all digital scanner. By digital I do mean
an A/D converter just after the PM amplifier and before image manipulation.
It was this digital scanner that used the tables you mentioned.
Hell went digital some years after Crosfield and stayed behind in all
technical developments for ever after - or rather until they were taken over
by A.N Other company.
All Hell's early scanners were analogue and there was no such thing as
lookup tables as they are used today.
Crosfield produced the first modular digital scanner with separate input and
output and the first digital page make-up device capable of accepting the
large files produced by drum scanners.
In addition they were the first organisation to enable high speed data
transmission of colour pages via fibre optic cable and satellite
transmission and they also produced a 12-1 lossless image data compression
facility.
Hell's only real first was the blue laser expose unit which, I might add,
used a 6 bit interpolator producing very poor skin tone reproduction and was
quite unable to screen at normal angles and only got away with it by running
each colour at different rulings.
John Crosfield is still alive and celebrated his 95th birthday a couple of
weeks ago.
I might add that he and Dr Hell were always good friends.
Incidentally his first products were designed for the Gravure Printing press
and, certainly into the 80's Crosfield had their colour to colour register
equipment fitted to 80%+ of the worlds Gravure presses.
While I would be the last person to denigrate Hell as an honourable and
vigorous competitor, ahead of the game they rarely were and in fact in only
one instance can ever I remember them being in that position.
Their contribution to the development of colour reproduction was always as a
follower behind Crosfield Electronics.
Richard - A long retired Ex-Crosfield man so just be careful what you say on
that subject.
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