Re: Tonopah Test Range images June 2010

On Jul 13, 12:10�pm, Gosh Darn <stealth...@iglou.com> wrote:

On Tue, 13 Jul 2010 00:17:35 -0700 (PDT), "m...@sushi.com"

<m...@sushi.com> wrote:

http://www.lazygranch.com/images/ttr/june2010/ttr_62010.jpg
or
http://www.lazygranch.com/images/ttr/june2010/ttr_062010_large.jpg

I suggest saving the files and viewing with Irfanview as these files
will probably be too large for your browser.

More to come ...


� � � � Ok, what the hell kind of camera took those, I saw
panorama cameras that turned beginning when I was
in grade school in the early 1930s, but they didn't
make images with even 20 percent such an extreme
aspect ratio.

� � � Also I work with 200 megabyte image files that
don't have the resolution of that big image at 13.3

� � � I loaded it in my ACDsee 4.9 image editor and
rotated it 90 degrees to print on my 24 inch wide
printer, but realized the print would be over 20 feet
long, and I don't have a wall long enough to hang
it on.

� � �IE called up Firefox for some reason, and Firefox
displayed the image so it all fit on the screen, so it
had hardly no height at all.

� � �If it is not a secret please post the details on
the camera. �


I just pasted single frames side by side. I attempt to do a good job,
but generally you can spot where I go from one frame to the next. The
lens is telescope plus barlow, making it about 2200mm in equivalent
focal length. Those shots are from about 15 miles away.

http://www.ptgui.com/

is probably the best of the bunch if you want to warp the images
before connecting them together. There is also a free version (the
predecessor to the commercial product) All I do is apply gradients to
even out the light, since the center of an image is usually a hot
spot. I also apply a gradient to attenuate the blue channel as you go
from bottom to top of the image, with more blue attenuation at the
top. This is because the top of the image contains areas that are
further way, with more distance equating to more atmosphere, and thus
more haze.

The image itself is filters with a KR1.5 and a 400nm low pass filter.
The lowpass kills the haze due to scattering (which is proportional to
the inverse of the 4th power of the wavelength), while the KR1.5
reduces the blue gradually to restore a natural balance.