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Best-Yet Look of Valles Marineris, Great video and fantastic stills
SigurRosFan
post Mar 14 2006, 12:17 PM
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- http://www.jpl.nasa.gov/news/news.cfm?release=2006-035 - Years of Observing Combined Into Best-Yet Look at Mars Canyon

- http://themis.asu.edu/vallesspecial - Valles Marineris Special Feature Directory

- http://www.nasa.gov/mission_pages/mars/mis...y/20060313.html - More Images

Enjoy!


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tedstryk
post Mar 14 2006, 05:51 PM
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QUOTE (SigurRosFan @ Mar 14 2006, 12:17 PM) *
- http://www.jpl.nasa.gov/news/news.cfm?release=2006-035 - Years of Observing Combined Into Best-Yet Look at Mars Canyon

- http://themis.asu.edu/vallesspecial - Valles Marineris Special Feature Directory

- http://www.nasa.gov/mission_pages/mars/mis...y/20060313.html - More Images

Enjoy!



That is cool! I hope they do this with MRO images.


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ljk4-1
post Apr 13 2006, 04:41 PM
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Image of the Day: A Five-Year Odyssey

http://www.space.com/imageoftheday/image_of_day_060413.html

NASA's Mars Odyssey continues to watch the red planet five years after arriving
at its target.

This archival image was taken by Mars Odyssey in December 30, 2002 during its first full year of operations at Mars.

A team led by Phil Christensen, principal investigator for Odyssey's cameras at Arizona State University, Jim Bell at Cornell University, and space artist Don Davis created this panorama, adding color to radiance files from the Thermal Emission Imaging System (THEMIS), a camera on Odyssey that takes images in both the visible and infrared parts of the spectrum. They also correlated the radiance - intensity of reflected sunlight - with that of other color images from Mars and minimized the effects of residual scattered light in the images.


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"After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance.
I see that such intercourse long continued would make one thoroughly prosaic, hard,
and coarse. But the longest intercourse with Nature, though in her rudest moods, does
not thus harden and make coarse. A hard, sensible man whom we liken to a rock is
indeed much harder than a rock. From hard, coarse, insensible men with whom I have
no sympathy, I go to commune with the rocks, whose hearts are comparatively soft."

- Henry David Thoreau, November 15, 1853

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DDAVIS
post Jun 12 2006, 07:57 PM
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Melas Chasma in color:

http://themis.la.asu.edu/zoom-20031114a.html

I thought I would post the steps from the original image to my truer colour version.
Left: the original data as initially presented here

Middle: the results of laborious hand retouching on each colour channel to remove the light leaks which mar the performance of this otherwise excellent color camera. The violet channel in particular is horribly lightstruck to varying degrees in nearly all such images. Constant comparison with the original was done to minimize subjective retouching effects. The result attempts to emphasize the colour subtlties of the subject the camera is seeing and minimize the ideosynchrosies of the camera itself.

Right, the results of rebalancing the colour to resemble known ranges of Martian hues. This image was widely distributed. More image releases using this technique are forthcoming.

Don
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djellison
post Jun 12 2006, 08:06 PM
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I must confess Don, I've often looked at the occasional releases of your work that make it into the Themis IOTD release, and thought "ooo...pretty....let's get some data and have a go" - but the banding just got in the way every time , I had no idea you removed it by hand - truely a labour of love!!! - I thought there was simply a calibration process I was unaware of when using the PDS importer for GIMP.
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dilo
post Jun 12 2006, 09:21 PM
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Amazing work, Don.
I hope you appreciate this further processing of last image, on the right (essentially a simple sharpening - I removed your intermadiate result)...
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gorelick
post Jun 12 2006, 10:37 PM
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QUOTE (djellison @ Jun 12 2006, 08:06 PM) *
I must confess Don, I've often looked at the occasional releases of your work that make it into the Themis IOTD release, and thought "ooo...pretty....let's get some data and have a go" - but the banding just got in the way every time , I had no idea you removed it by hand - truely a labour of love!!! - I thought there was simply a calibration process I was unaware of when using the PDS importer for GIMP.

I'm (slowly) working on some software to allow you to do this a bit less ad-hoc. The VIS calibration process makes a bunch of initial guesses involving stray-light, and we can expose those settings as knobs that user's can tune on a per-framelet basis, or which can be programmatically optimized.

It's just been pretty low priority.
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tedstryk
post Jun 13 2006, 12:45 AM
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Great work! It is amazing what can be pulled out of that dataset.


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