LRO development |
LRO development |
May 2 2005, 01:31 AM
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#101
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
Just read this interesting article about LRO
http://science.nasa.gov/headlines/y2005/28apr_lro.htm QUOTE "This is the first in a string of missions," says Gordon Chin, project scientist for LRO at NASA's Goddard Space Flight Center. "More robots will follow, about one per year, leading up to manned flight" no later than 2020." One per Year? Is this just wishful thinking or have any tentitve plans been mentioned for follow up missions after LRO? If the next one is going to be 2009/10 then I guess some desisions about it will have to be made fairly soon. James -------------------- |
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Guest_DonPMitchell_* |
Sep 6 2006, 12:03 AM
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#102
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Guests |
[attachment=7296:attachment]
You can convert the measured spectral reflectivity of planets into CIE XYZ, and from there into gamma-corrected sRGB 24-bit colors. In my "planetary paint-chip" image above, I adjusted the Y values to be proportional to the albedos of the objects. |
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Sep 6 2006, 07:12 AM
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#103
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
You can convert the measured spectral reflectivity of planets into CIE XYZ, and from there into gamma-corrected sRGB 24-bit colors. In my "planetary paint-chip" image above, I adjusted the Y values to be proportional to the albedos of the objects. Very interesting. Did you use average spectra of the objects, that is does Saturn's color include both the rings and the planet itself? Hence the color Saturn reduced to a point source would have, just as Saturn appears in the night sky? EDIT: When you say gamma-corrected, do you mean compensating for the CRT 2.2 gamma or something else? I'm having trouble getting a grasp just what gamma value should be set, when converting linear-light images for viewing on monitors, escpecially not knowing whether the LUT in the video card's RAMDAC already takes care of that. Most modern video card drivers do allow setting the gamma manually, but I'm uncertain whether this is just applying another one on top of the 0.45 gamma. BTW, here's a nice page about the subtle colors of the moon: http://www.colormoon.pt.to/ -------------------- |
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