Materials for Flat-Fielding
Materials for Flat-Fielding
- Subject: Materials for Flat-Fielding
- From: "Fleisher, Ken" <email@hidden>
- Date: Fri, 01 Jun 2007 14:03:01 -0400
- Thread-topic: Materials for Flat-Fielding
Hello. I have a question about flat-fielding for digital image
capture.
Currently, we use either white foam core or a white cardboard to
capture the image for flat-fielding.
I don't like using the foam core because it is too easy to dent and
scratch and the surface very quickly becomes non-uniform. It also
seems to hold a strong static charge and picks up dust and dirt very
easily and is difficult to clean without marring the surface.
The cardboard that we use has too much texture on the surface which
isn't good for flat-fielding. We counteract this somewhat by settng
the camera slightly out of focus. We can't seem to find a cardboard
with a smoother surface.
My question is what material(s) do you recommend/use for this task? We
would need to ve able to get it in large sizes as well as smaller
sizes.
Thanks for any suggestions...
--
Ken Fleisher
Photographer
Imaging & Visual Services
National Gallery of Art
Washington, D.C.
Phone: (202) 712-7471
email@hidden
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