Re: Poor TIFF Performance (Regardless of Default App)

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jrsjs wrote:
Hi John,

Thanks very much for your reply and for the helpful link. I think I
am going to order the book!

The reason I have been scanning at 6400 ppi is that the "native"
optical resolution of my new Epson Perfection V500 scanner is 6400
ppi. I have been advised that the best results are obtained by
scanning at the optical reolution of the scanner and then downsizing
if necessary. Photoshop also mentions this in its Help pages.

Also the V500 is very fast and even scanning such huge files only
takes a few minutes - even when using Digital Ice, so it's not much
hardship. The scanner will interpolate to 12800 but I can't see the
point of that!

I think that it is a bit of a catch 22 as if I scan at 6400 and then
downsize, there will be throwing out of information. If I scan at a
lower resolution, it seems from reading the article in the link, that
there will be a downsampling by the scanner.

I have just read in the Photoshop manual that Photoshop "only"
supports up to 300,000 x 300,000 pixels. My 1GB file is 13525 x 13290
so it's not that, it seems.

I think the problem is something to do with the huge file sizes
though and I cannot so far find a way of allowing the files to be
accepted. They just will not work in the Office picture applications.

I think I will just have to scan at lower resolutions. Lower res
scans do work.

Best wishes,

John
=============================
I have no idea what you are scanning
or how you plan to use the scans but
in my experience...scanning old family
pictures...300 DPI is all I need. The only
thing accomplished IMHO by scanning
higher resolution is to increase the size
of the file.

You can experiment for yourself...scan
a picture at 300 DPI and also a higher
resolution. Then compare them...and
decide for yourself if you think the higher
resolution is an improvement.

--

John Inzer
MS Picture It! -
Digital Image MVP

Digital Image
Highlights and FAQs
http://tinyurl.com/aczzp

Notice
This is not tech support
I am a volunteer

Solutions that work for
me may not work for you

Proceed at your own risk


.

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