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.I have
done much work on the very important Great Mural site 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.
It runs on both MACs and PCs.
Make a contribution (below) and email DStretch@prodigy.net
to get DStretch. It is best to use a personal email
address. Many institutions do not allow the DStretch
plugin attachment.
A contribution
is mandatory before I will send the plugin. It
may take me a few days to respond, have patience.
Unfortunately there have been too many
requests and too few contributions for me to continue to
give it away.
Please note that the plugin is not an app. It has
much more functionality than is possible in an app on a
smartphone.
The apps are available from the Apple App Store
(iDStretch) or Google Play Store (aDStretch).
Contribution is $50. Use the Donate button below.
If you want to send a check email me for my
address.
Current version is 8.41.
Contributors
will
receive
new
versions
as
they
come
out.
At Rancho Bernardo Style site (photo by Jeff LaFave)
Piedras Pintas
At Croc-Marin in Fontainebleau, France with Michel Rey
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.
Presentations on Amanita Muscaria by Gordan Wasson,
Keewaydinoquay Peschel, Reid Kaplan. Recorded at the
conference "Hallucinogens in Native America."