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[filmscanners] Re: File size in PS?



I saw -just the other day, but can't remenber where on the net - that
Vuescan use a compression option which PS does not use, I think for reasons
of compatibility of older versions.
Could you have compressed again or resized in Vueprint? I think Ed Hamrick
no longer updates Vueprint, so that programme would not use newer
technology.

Robert

PS I don't worry about the price of the CD-R's either, but the number of
them and the place they take ... :)
----- Original Message -----
From: Nagaraj, Ramesh <RAMESH.NAGARAJ@ca.com>
To: <opopanax@xs4all.nl>
Sent: Friday, July 26, 2002 5:43 PM
Subject: [filmscanners] File size in PS?


> Hi,
>
> At maximum resolution, single pass, my Minolta Elite II generates 35.MB
TIFF file.
> If I open the above file in PS and do a "SaveAs"(with LZW compression),
file size increases. I do not know why?
>
> Here are details.
>
> Vuescan file size- 35MB
> PS "SaveAs" with LZW - 56MB
> PS "SaveAs" without LZW - 66MB
>
> I looked at the Explorer/Properties/Summary for both Vuescan file & PS
file. The changes are as follows.
>
> ****** Vuescan file summary (Looked using Explorer/Properties/Summary)
*****
> Compression-
> Lempel-Ziv with Tiff Horizontal differ...
> File size- 34.7mb
>
> *** PS "SaveAs" file summary (Looked using Explorer/Properties/Summary)
****
> Compression- Lempel-Ziv
> File Size- 66MB
>
>
> So the difference between the two is; PS uses Lempel-Ziv "Lempel-Ziv
Horizontal differ..." compression while Vuescan follows "Lempel-Ziv"
compression.
>
> I tried using VuePrint for compression, it reduced the 34MB file to around
20MB.
>
> My questions are
> a) Why the "SaveAs" in PS increses the file size?
> b) "VuePrint" for file compressses more than PS & "VueScan";  Does it mean
"VuePrint" use latest LZW technology which PS6.0 does not implernent?
>
>
> Any thoughts about this is welcome. I do not worry about the price of the
CDs but I worry about the numbers.
> Thanks
> Ramesh
>
> ********* I had sent this mail earlier, but it was not reaching the list;
so sending it again **************************
>
>
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