Message-Id: <mailto:199506151535.IAA24860@listserv.ccit.arizona.edu> Date: Thu, 15 Jun 1995 10:34:20 CST From: David Riecks <mailto:riecks@CC-MAIL.AGCOMED.UIUC.EDU> Subject: Re[2]: resolution to scan To: Multiple recipients of list IMAGELIB
At 08:30 6/15/95, Francis Huang wrote:
>In creating a digital photo archive, what resolution should the pictures be
>scanned at. We are planning to scan using a slide scanner and a flatbed
>scanner. Any suggestions?
>
>Francis L. Huang
>Educational/Multimedia/Technology Consultant
>Philippines
>Tel: (632) 633-4546 Fax: (632) 817-4250
>Beeper no: 150:334349
>E-mail: mailto:fhuang@globe.com.ph & fhuang@irf.pfi.net
>
>------------------------------------------------------------------
>"Learning is like rowing upstream, not to advance is to drop back"
> -- Chinese Proverb
The best suggestion I have is to start with the end in mind. Find out
what your clients want to do with the images when you are finished. Do
they only want to view them on-screen at 4 x 5. Scanning for 6 x 9 at
72 or 100 ppi is probably sufficient (this would allow one zoom in
level). Do they want to be able to print out the image to a laser
printer--then you would want to have the image scanned it at least to
the level of the printer at the size you want. For example, if you
want to kick out to a 300 dpi laser printer, scan in at 300ppi at the
size you want the final print to appear.
It's probably best to take a few images, and scan them, do any
contrast adjustments, etc and then compress them if you wish. Then put
them into your application and try to use them like your clients will
when the system is up and running.
I'm always reminded of the story that I heard about the Rolling Stones
(this analogy is a stretch, so hang with me). Mick was a
perfectionist and would always want to get the sound mix "just right."
So he would have the recording engineer run a dub of what they thought
would be the final mix and then he and the rest of the Stones would
drive to the nearest radio station. They would walk in on the disk
jockey, and ask if he would be so kind as to play there as yet
unrelease song (and what DJ wouldn't love to have this happen!). Then
they would dash out to their rental car and listen on the AM radio. If
the mix sounded good on a mono speaker in a rental car....they figured
it would sound good anywhere...including your high priced stereo.
I've always found this a good method for fine-tuning any particular
system--sound, image, or otherwise.
Just my $.02 worth.
David
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*| David Riecks | "There's a fine line between |*
*| University of Illinois | fishing and just standing on |*
*| mailto:riecks@uiuc.edu | the shore like an idiot." |*
*| mailto:71543.1617@compuserve.com | Steven Wright |*
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