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.
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 6.5.
Its
free, but
contributions are welcome. Allow a
couple days for me to reply with the plugin.
I
will be traveling from August 17 to 22. I'll send out the plugins
when I get back.
I have started a list of those who
wish to get new versions as they come out. Email me to get on the
list. Suggested contribution is $50. You can
make a contribution via PayPal.
My account is DStretch@prodigy.net. If you want to send a check
you will find my address on the email I send with the plugin.
If you use the email form be sure to check your spelling.
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 ARARA 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.
