8 messages in edu.ku.nhm.mailman.taxacomdigital images of type specimens
FromSent OnAttachments
Bruce NeillAug 22, 1995 10:48 am 
Shawn Landry (BIO)Aug 22, 1995 10:53 am 
Doug YanegaAug 22, 1995 11:01 am 
Peter RauchAug 22, 1995 9:24 pm 
LINGAFELTER STEVEN WAYNEAug 22, 1995 10:22 pm 
Peter RauchAug 23, 1995 10:13 am 
Curtis ClarkAug 25, 1995 8:28 pm 
Shawn Landry (BIO)Aug 28, 1995 10:04 am 
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Subject:digital images of type specimensActions...
From:Curtis Clark (jccl@CSUPOMONA.EDU)
Date:Aug 25, 1995 8:28:35 pm
List:edu.ku.nhm.mailman.taxacom

Date sent: 25-AUG-1995

Along a similar thread, I took a bunch of slides of types and was disappointed to find them all very dark. Some color and most structures are visible, but these aren't good enough to use to answer many questions about these taxa. Is there affordable software that is available to capture some of the hidden information? In other words can I refine

Sounds like an exposure problem. Anything photographed against a light background (herbarium paper, white enamel pans, or whatever) reflects around 30% - 70% of the light hitting it, but automatic exposure meters are designed for a world that reflects 18% of the light. There are gray cards that reflect 18% that you can take the exposure reading from, and then substitute the specimen.

------------------------------------------------------------------------- Curtis Clark Voice: (909) 869-4062 Biological Sciences Department FAX: (909) 869-4396 California State Polytechnic University, Pomona Pomona CA 91768-4032 jcclark at csupomona.edu

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