Rev 123 - Dec 18, 2009-Jan 3, 2010 - Prometheus |
Rev 123 - Dec 18, 2009-Jan 3, 2010 - Prometheus |
Dec 21 2009, 05:20 PM
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
I was struck by how much images like this...
http://saturn.jpl.nasa.gov/multimedia/imag...5/N00148493.jpg ... remind me of the view through my 4.5" scope when I peer into it without the eyepiece. LOts of fascinating internal light reflections there... -------------------- |
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Dec 28 2009, 03:52 PM
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I cheat to get color. RGB color combos from Cassini images almost always have some completely white pixels due to the automatic stretching. To set the color I just go grab something Gordan made from calibrated imagery and set the RGB values of that brightest pixel to those of a bright pixel in a Gordan image. It's not science but then images made from raws aren't science either.
Also for the version I posted in the blog I made an RGB combo from red, green, and blue filter images, and also stacked the red, IR, clear, and green channel images to make one that was less affected by JPEG artifacts and noise, then did a nonlinear stretch on it to bring out some more of the detail in the brighter regions, then sharpened it just a little bit. Then I converted the RGB to HSB and swapped in the sharpened image for the clear channel. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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