Stardust Lunar Flyby |
Stardust Lunar Flyby |
Jun 27 2006, 03:05 AM
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#1
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
A while back, I tried to clean up Stardust's moon image... I now have a much better version. Removing the blur from the scum on the lens was a pain!
Here is an "official" version. Here is my version. [Note - an improved version is lower down in this thread] -------------------- |
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Jun 27 2006, 03:23 AM
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#2
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
Wow! Great job cleaning that up Ted.
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Jun 27 2006, 03:34 AM
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#3
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Member Group: Members Posts: 169 Joined: 17-March 06 Member No.: 709 |
That's a beautiful job of cleaning up the image. However, I believe that the image has been reversed, i.e., you have a mirror-image on your hands. Another Phil |
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Jun 27 2006, 06:51 AM
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#4
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Stardust's Navigation Camera optics include a periscope with a Mirror - so yet....it is mirrored
To put it mildly Ted...how the hell did you do that Doug |
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Jun 27 2006, 12:16 PM
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#5
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I got rid of the actual image for each frame, and generated a mask that was "pure blur" then I subtracted it. I did a bit of super-resolution processing, but the primary reason for stacking all the good images in the set was to build the image back up, since the grayscale was, um, strained.
Some of the images, if you look at them closely, were quite good under the haze. For example, this one: Here is an improved version. Stacking the image took a bit of re-projection, because NAVCAM is acutally a Cassini wide angle camera, so there is a lot of time between frames. Ted -------------------- |
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Jun 27 2006, 12:59 PM
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#6
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Ahhh... the rapid-fire mechanism of the Cassini cameras...
I'm curious - how do you perform your reprojections? Custom made or some other software? -------------------- |
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Jun 27 2006, 01:16 PM
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#7
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Ahhh... the rapid-fire mechanism of the Cassini cameras... I'm curious - how do you perform your reprojections? Custom made or some other software? Depends...if it is severe difference, one has to project the image on to a virtual globe and make the central meridians match. In cases where it isn't too severe, a little pushing and pulling will work, except on limbs, which usually don't end up working anyway, unless you have a good 3-D topography model or a world that is really flat. -------------------- |
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Guest_Richard Trigaux_* |
Jun 27 2006, 02:57 PM
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#8
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Guests |
What it interesting with this kind of job, is that it could enhance images of unknown objects, instead of the weel known Moon. Perhaps Cassini images of Titan ground?
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Jun 28 2006, 12:30 AM
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#9
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I have looked into that. But the difference there is that the blurring is more complex...it is travelling through multiple layers, rather than just being blurred by fog on the lens. And there are a lot of other complexities. But this view is a fairly neat angle, looking at the lunar South Pole with Schrodinger just to the left of center on the terminator.
Here is a cleaner version (I have been working on this for a long time, but every time I look at it, I see something else to tweak. -------------------- |
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Jun 28 2006, 01:40 AM
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#10
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
What it interesting with this kind of job, is that it could enhance images of unknown objects, instead of the weel known Moon. Perhaps Cassini images of Titan ground? Or Stardust images of Wild 2 -------------------- If Occam had heard my theory, things would be very different now.
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Jun 28 2006, 02:05 AM
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#11
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Or Stardust images of Wild 2 Wild 2 is harder, because since it does have jets and a tail, it is hard to distinguish one type of blur for another. At any rate, the situation was much less severe at Annefrank and Wild2 compared to the moon. -------------------- |
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Jun 28 2006, 07:06 AM
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#12
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Yes - they baked the hell out of the optics to clear the contamination away - I found the Wild 2 images to be just about OK
Doug |
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Jun 28 2006, 01:37 PM
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#13
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Yes - they baked the hell out of the optics to clear the contamination away - I found the Wild 2 images to be just about OK Doug The Annefrank images appeared pretty clear too. The apparent blur is due to the fact that the original images are so tiny. -------------------- |
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Apr 19 2007, 01:53 AM
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#14
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Solar System Cartographer Group: Members Posts: 10146 Joined: 5-April 05 From: Canada Member No.: 227 |
A long time ago Ted Stryk asked my to post the version of the Stardust lunar image I am using in my atlas. Ted, I'm sorry to take so long, things are rather crazy around here right now, and only recently have I been able to go back and clear up some outstanding things.
When I say outstanding, I mean overdue, not a great picture. Ted's version is far superior. In this case I'm printing this so small that quality was not a big issue. I have fudged the darkness of the maria to give a better impression of them in the very small image on the page. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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