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Roger,
Go to PS6
Edit-preferences-saving files and tick enable advanced features. That will give
you the extra Tiff file options.
Geoff
----- Original Message -----
Sent: Wednesday, August 08, 2001 7:44
AM
Subject: Re: filmscanners:
(anti)compression?
Well, my Photoshop 6.0
(on a PC) doesn't offer any compressed TIFF file
formats. When doing
a "Save-as" for a 48-bit file, I was given three
choices:
TIFF(*.TIF), Ras(*.RAW), and Photoshop(*.PSD,*.PDD). When saving a
24-bit file, I have many more choices including GIF, JPEG, etc., but
nothing
that implies a compressed TIFF.
In a message dated
8/7/2001 2:29:44 PM Pacific Daylight Time,
steve@gccl.fsbusiness.co.uk
writes:
If you re-save a file PS will automatically save in the format
that was
opened.
If you use "save as" and select TIFF you get
the choice of compression
(none,LZW,JPEG,ZIP). Of these JPEG is lossy.
None is the standard TIFF. The
other three are legal variations that may
not be supported by software that
the person reading the file is using.
Therefore unless otherwise told use
TIFF (no compression) or normal JPEG
(not the TIFF variety) if you intend
someone else to read it.
Steve
----- Original Message -----
From:
<RogerMillerPhoto@aol.com>
To: <filmscanners@halftone.co.uk>
Sent: Tuesday, August 07, 2001 9:45 PM
Subject: Re: filmscanners:
(anti)compression?
> This is probably a stupid question, but
how do you do an LZW compression
on a
> TIFF file?
Photoshop doesn't offer TIFF compression as an option, as far
as
> I know. Is there freeware available? Since a lot of my
work involves
models
> against a solid colored background, it
seems like lossless compression
would
> save me a lot of storage
space. I assume you have to run a stand alone
> decompression
program to get the original file back.
>
> In a message dated
8/6/2001 7:03:48 PM Pacific Daylight Time,
> jimsnyder@insight.rr.com
writes:
>
>
> > That is because LZW works by
substituting colors with variables. If you
have
> > an image
with very few colors and shades, LZW will compact it to a tiny
> >
fraction of its original self. On the other hand, a very diverse image
with
> > lots of colors and shades will require tons of
substitutions, and the
size
> > becomes larger.
> >
>
>
>
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