DStretch
can
bring
out
faint
pictographs
that
are
invisible
to
the
naked
eye.
It
works
on
digital
camera
images.
No
special
filters or lighting are
needed.
To see what it can do check out the slide shows, especially Rocky Hill and Tulare. More Rocky Hill
images are in the RA 2006
presentation on Rocky Hill. The ARARA 2007
presentation has some
beautiful images from Kachina Rockshelter in Nevada.My wife Sheila and I visited Tanzania in
2009. DStretch worked very well as can be seen in the Masange slideshow.My latest work has been on Cueva San
Borjitas. I gave presentations about this incredible site at SAA 2011 in Sacramento
and ARARA 2011
in Idaho falls and Rock
Art
2010
in San Diego
and Balances
2010 in Ensenada and have a slideshow about it here.
DStretch
uses
decorrelation
stretch.
This
is
an
image
enhancement
technique
first
used
on
aerial
photos.
For
an
explanation
of
how
it
works
see the algorithm
description.
DStretch is a
tool for rock
art researchers who wish to enhance images of pictographs.It is a plugin to ImageJ. ImageJ
is an image
processing and analysis program written in Java. It needs to be
installed first before you can use DStretch.
Current version is 7.2.
Its free, but contributions are welcome. Allow a
couple days for me to reply with the plugin.
Contributors
will
receive
new
versions
as
they
come out.
Suggested contribution is $50. You can
make a contribution via PayPal.
My account is JonHarman "at" prodigy.net. If you want to send a
check
you will find my address on the email I send with the plugin.
DStretch
plugin written by Jon
Harman.
Remembering Alvin R McLane
Alvin
McLane died October, 2006 in Reno
Nevada. An obituary
is here.
Without doubt Alvin was the premier rock art researcher in
Nevada. I went on many rock art trips with Alvin and will miss
him greatly. I have put together a slideshow of my pictures of
Alvin. At NAA in Ely, Nevada I gave a presentation
on Alvin's last road trip. At the 2007 ARARA meeting in Billings,
Montana I gave a
presentation on Kachina Rockshelter, a place I visited with Alvin on the
trip. Alvin and I intended to write a paper on the sites we
visited.
