Exquisite Saturn Images |
Exquisite Saturn Images |
Aug 15 2009, 05:18 PM
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#346
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Member Group: Members Posts: 646 Joined: 23-December 05 From: Forest of Dean Member No.: 617 |
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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Viva software libre! |
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Aug 15 2009, 05:29 PM
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#347
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
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.
I think that Gordan will produce a better picture than mine. Nope, I'm not even trying this one 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: -------------------- |
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Aug 16 2009, 08:55 AM
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#348
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Senior Member Group: Members Posts: 1414 Joined: 26-July 08 Member No.: 4270 |
Nope, I'm not even trying this one 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. -------------------- -- Hungry4info (Sirius_Alpha)
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Aug 16 2009, 10:24 PM
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#349
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Here's my first crack at a color Saturn near-equinox image (August 3rd image). Northern hemisphere is shown (rings in shadow):
-------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Aug 17 2009, 03:03 AM
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#350
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Storms in the north pole of Saturn on August 12, 2009:
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 -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Aug 17 2009, 03:33 AM
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#351
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Senior Member Group: Moderator Posts: 3226 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
(That's Rhea in the background.) Neat composite. Btw, that's Janus, not Rhea. here is the celestia sim from that frame time: -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Aug 17 2009, 05:01 AM
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#352
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
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. (The seam cuts right through the big "Cheerio" cloud near the terminator.) -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Aug 18 2009, 03:42 PM
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#353
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Junior Member Group: Members Posts: 30 Joined: 30-May 05 Member No.: 396 |
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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Aug 19 2009, 04:58 AM
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#354
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Another attempt at the same North Polar composite 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. -------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Aug 20 2009, 03:46 AM
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#355
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
-------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Aug 20 2009, 05:43 AM
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#356
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Senior Member Group: Moderator Posts: 3226 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
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. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Aug 28 2009, 12:47 PM
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#357
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Member Group: Members Posts: 753 Joined: 23-October 04 From: Greensboro, NC USA Member No.: 103 |
Another beaut today!
Shadows big and small -------------------- Jonathan Ward
Manning the LCC at http://www.apollolaunchcontrol.com |
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Aug 28 2009, 12:58 PM
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#358
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Forum Contributor Group: Members Posts: 1372 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
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.
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Sep 2 2009, 02:14 AM
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#359
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
-------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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