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Rev198: Saturn wide-angle mosaic
ugordan
post Oct 16 2013, 11:07 PM
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On October 10th, Cassini wide-angle camera captured a set of 12 RGB footprints covering Saturn and the rings. Here's an attempt at compositing that data into a mosaic. It's not geometrically accurate, but I tried coaxing the data into at least looking nice.



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elakdawalla
post Oct 17 2013, 12:17 AM
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...and that one's going straight to the blog. Absolutely amazing work with the raw JPEGs, Gordan.


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tedstryk
post Oct 17 2013, 01:13 AM
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My jaw just hit the floor...amazing!


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ElkGroveDan
post Oct 17 2013, 04:17 AM
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Holy smokes! I'm speechless. Thank you Gordan for sharing.


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Astro0
post Oct 17 2013, 05:16 AM
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Wow! That's the sort of view I've dreamed I would only ever see in a science fiction movie or if we had somekind of amazing futuristic spacecraft orbiting around that distant ringed planet....WAIT! We do! blink.gif biggrin.gif
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Explorer1
post Oct 17 2013, 05:23 AM
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Aaaand that's a new desktop...
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remcook
post Oct 17 2013, 07:28 AM
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Really great! smile.gif
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Ian R
post Oct 17 2013, 09:36 AM
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Amazing Gordan! blink.gif

If you don't mind me picking your brain, just how do you go about combining the night-side hemisphere with the sunlit part of the disc? HDR merging or your own special sauce? biggrin.gif

This was my attempt at working with the Clear-filtered frames:

http://postimg.org/image/w3qnpzhtl/full/


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ugordan
post Oct 17 2013, 10:52 AM
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Ian, I simply assumed the original data used 12bit encoding mode used so the JPEG DNs are basically linear (a reasonable, but not 100% accurate assumption when uncalibrated images are concerned) as it looked that way to me and the color profile I use in Photoshop (and the one I use for calibrated data that is linearized by default) automatically adjusts that to the sRGB 2.2 display gamma. The nightside was heavily noise-reduction filtered to reduce blocky artifacts, though.


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The Bad Astronom...
post Oct 17 2013, 12:18 PM
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QUOTE (elakdawalla @ Oct 16 2013, 05:17 PM) *
...and that one's going straight to the blog. Absolutely amazing work with the raw JPEGs, Gordan.


I just posted about it as well, with a description of some of the sights. Gordan, this was an AMAZING piece of work! And Emily, thanks for linking to it; I saw it first in your tweet and blog. I credit you, of course. smile.gif

http://www.slate.com/blogs/bad_astronomy/2..._ugarkovic.html

[Sorry to misspell your first name in the URL!] My favorite part (besides the steep angle lowering the usual elliptical appearance of the rings) is seeing Prometheus and Pandora to the upper right of the F ring. Astonishing, on this scale.


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jamescanvin
post Oct 17 2013, 01:05 PM
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Oh My! That is astonishing. New desktop here as well. smile.gif


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stephenv2
post Oct 17 2013, 02:56 PM
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QUOTE (ugordan @ Oct 16 2013, 07:07 PM) *
On October 10th, Cassini wide-angle camera captured a set of 12 RGB footprints covering Saturn and the rings. Here's an attempt at compositing that data into a mosaic. It's not geometrically accurate, but I tried coaxing the data into at least looking nice.


"looking nice" is the understatement of the century. That is a stunning. breathtaking image. Incredible work.

Any chance of sending me the uncompressed master of this? This would be ideal for animation sequence in the film due to its resolution smile.gif


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Explorer1
post Oct 17 2013, 05:05 PM
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You're on Slashdot too (and so is this thread).
http://science.slashdot.org/story/13/10/17...n-all-its-glory
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ElkGroveDan
post Oct 17 2013, 05:30 PM
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QUOTE (The Bad Astronomer @ Oct 17 2013, 05:18 AM) *
My favorite part ... is seeing Prometheus and Pandora to the upper right of the F ring. Astonishing, on this scale.

Whoa, Phil, good eye. That really is amazing.


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stephenv2
post Oct 17 2013, 05:57 PM
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QUOTE (The Bad Astronomer @ Oct 17 2013, 08:18 AM) *
My favorite part (besides the steep angle lowering the usual elliptical appearance of the rings) is seeing Prometheus and Pandora to the upper right of the F ring. Astonishing, on this scale.


Agreed. Gordan sent me a lossless version of this for use in the film and I'm mulling over it if I can connect it to some of Cassini's closer view of Prometheus and Pandora. I will have to look closely at my raw archives. There is some stuff here but not sure if 100% will match up: Cassin Raw image movie.

I just looked at this on my cheap 50" Seiki 4K UltraHD I have hooked up to my main desktop. Pretty staggering at full resolution. Can't wait to see this on a 8-story high screen.


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