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Subject: Re: Acquiring digital images of fish scales
From: Peter Hagen <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Wed, 6 Apr 2005 12:44:46 -0800
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James
Digital microfiche scanners  also work very well,  particularly if you are
using scale acetate impressions - which is a protocol that has long been
used
for  Pacific salmon scales.  We've used a product produced
by Screenscan (try a Google search) which is basically a flatbed scanner
attached to a microfiche reader. It will acquire 8 bit tiff  images up
to 400 DPI
or about 14 M pixels.  I'm no longer directly involved now
but there are several fish labs using it for production scanning and
digitizing
of Pacific salmon scales.  Whether it would be considered cost-effective
of course depends on your budget and needs.

Since this  list doesn't allow attachments,  if anyone is interested in more
information  contact me off list and I'll be happy to pass along a gray
literature
document that  describes the setup

Regards,

Pete Hagen
[log in to unmask]


James Hunt wrote:

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>Dear colleagues,
>
>We are looking for a digital microscope or scanner system that can be used
>to acquire good quality digital images of Atlantic Salmon and Trout
>scales.  I have looked on the web without any great success and we have
>tested an Olympus digital microscope that did not produce good quality
>images. With the current improvements in digital camera / sensor
>technology, I'm sure there must be a relatively cost effective method
>available?  We would be grateful for any suggestions.
>
>Thanks
>
>James Hunt
>Assistant Biologist
>
>
>
>><{{{'>    ><{{{'>     ><{{{'>     ><{{{'>
>>
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>
>The Tweed Foundation
>The Fish Conservancy Centre
>Drygrange Steading
>Melrose
>Roxburghshire
>TD6 9DJ
>Scotland
>
>tel. 01896 848271
>mob. 07884 230038
>fax 01896 848277
>e-mail [log in to unmask]
>
>
>
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