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Exquisite Saturn Images
imipak
post Aug 15 2009, 05:18 PM
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Perhaps it's perverse, but I find the small reminders of the nature of the source images adds to the impact of the finished product (as did seeing the work in progress.) Bravo, Ant!


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ugordan
post Aug 15 2009, 05:29 PM
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Nice work, Ant. It's hard to appreciate how difficult it is to stitch a mosaic like that from a moving observer if you've never attempted it.

QUOTE (Ant103 @ Aug 15 2009, 04:45 PM) *
I think that Gordan will produce a better picture than mine.

Nope, I'm not even trying this one smile.gif As you saw, it's tough enough to fudge the perspective shift, let alone dealing with colors in uncalibrated data and trying to bring out *any* hint of rings consistently. This is as far as I'll go:

Attached Image



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Hungry4info
post Aug 16 2009, 08:55 AM
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QUOTE (ugordan @ Aug 15 2009, 12:29 PM) *
Nope, I'm not even trying this one smile.gif As you saw, it's tough enough to fudge the perspective shift, let alone dealing with colors in uncalibrated data and trying to bring out *any* hint of rings consistently. This is as far as I'll go:


Very nice image though. Why try to bring out the rings though? Isn't that what the Saturnian Equinox is about? No visible rings?
I never see Saturn without rings. Sure they're beautiful, but it's like wearing the same hat every day.


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Juramike
post Aug 16 2009, 10:24 PM
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Here's my first crack at a color Saturn near-equinox image (August 3rd image). Northern hemisphere is shown (rings in shadow):

Attached Image


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Juramike
post Aug 17 2009, 03:03 AM
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Storms in the north pole of Saturn on August 12, 2009:

Attached Image


LRGB image taking the luminosity from IR3 and the RED-GR1-BL1 channels. Lotsa contrast manipulation and high-pass filtering. Done for artistic effect, not color accuracy.

(That's Rhea Janus in the background.)


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volcanopele
post Aug 17 2009, 03:33 AM
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QUOTE (Juramike @ Aug 16 2009, 08:03 PM) *
(That's Rhea in the background.)

Neat composite.

Btw, that's Janus, not Rhea. here is the celestia sim from that frame time:


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Attached Image
 


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Juramike
post Aug 17 2009, 05:01 AM
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Full version of the North polar region of Saturn on August 12, 2009.

A second set of images was combined....had to do some serious warping to match these up due to changing perspective due to spacecraft motion, and cloud rotation.

Attached Image


(The seam cuts right through the big "Cheerio" cloud near the terminator.)



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Elias
post Aug 18 2009, 03:42 PM
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One question based on images like that one:

http://photojournal.jpl.nasa.gov/jpeg/PIA08388.jpg

The northern hemisphere atmosphere shows much more structure than the southern hemisphere one: is this an optical effect due to the different illumination conditions, or is it a real difference?
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Juramike
post Aug 19 2009, 04:58 AM
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Another attempt at the same North Polar composite image:
Attached Image


This is also a HiPass-LRGB composite with the L component coming from the RED (CL1 RED Cassini Raw image) channel.
(Turns out IR3 cloud patterns don't match well with RGB due to spacecraft motion/cloud rotation)

Each filtered image was stretched before stuffing into the corresponding channel:
[R(10-245); G(10-225); B(10-160).

And of course, infinite fiddling to try to match previous pretty images.

Noway would I call this even close to what you'd see with a spacesuited eye. But I think it's closer than my first attempt.



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Juramike
post Aug 20 2009, 03:46 AM
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I really like abstract images such as this:
Attached Image



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volcanopele
post Aug 20 2009, 05:43 AM
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I have to admit, this one is quite beautiful:

http://saturn.jpl.nasa.gov/photos/raw/rawi...?imageID=199256

a crescent Saturn with two crescent moons.


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ilbasso
post Aug 28 2009, 12:47 PM
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Another beaut today!
Shadows big and small


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MahFL
post Aug 28 2009, 12:58 PM
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Earlier this week I was stretching my legs outside my office and was looking along a concrete footpath that runs north/south, on it were cast long shadows of grass stalks made by the low morning sun. It reminded me of the rings of Saturn. smile.gif
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Juramike
post Sep 2 2009, 02:14 AM
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Composite image of Saturn's ring assembled from raw images:

Attached thumbnail(s)
Attached Image
 


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