MEX VMC - Back on, and online! |
MEX VMC - Back on, and online! |
Aug 22 2008, 01:58 PM
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#1
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
I heard about this 24 hours ago, and couldn't believe it - this is EXACTLY what has been missing from ESA. MASSIVE kudos to the ESOC MEX flight ops team for doing it
http://www.esa.int/SPECIALS/VMC/index.html The last time I wrote a post and hit 'submit' at UMSF with a smile this big on my face, was when Oppy successfully got out of Purgatory. |
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Nov 25 2009, 07:42 PM
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#2
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Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
It's a camera artefact, there's some funky internal reflections and god knows what else going on with it.
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Nov 25 2009, 07:48 PM
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#3
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
It's a camera artefact, there's some funky internal reflections and god knows what else going on with it. It reminds me of an emulsion tear on the old Cibachrome photo paper, (1970s before you kids were born.) -------------------- If Occam had heard my theory, things would be very different now.
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Nov 25 2009, 08:41 PM
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#4
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
I've long been contemplating a flatfield for the camera, but the trouble is it's not trivial to generate one from non-blank images such as we get. I wasn't also sure if it would make much difference. Turns out it does help, as an exercise I stacked 6 or so recent frames and selected a (small!) portion of the resulting image that provided best noise reduction as a makeshift flatfield. Here's a comparison of an image without this section multiplied out (though in photoshop which does not do proper multiplication AFAIK). See if you can figure out which bit was flatfielded:
The "flatfield" still has some residual surface details from the original image and is obviously not spatially uniform. If I pursue this further and it turns out good, I may add automatic flatfielding to the vmc2rgb tool. -------------------- |
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Nov 25 2009, 10:36 PM
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#5
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Here's a comparison of an image without this section multiplied out (though in photoshop which does not do proper multiplication AFAIK). See if you can figure out which bit was flatfielded... If I pursue this further and it turns out good, I may add automatic flatfielding to the vmc2rgb tool. It's a definite improvement. The area most affected by the flatfielding also appears smoother -- I thought that was all noise, but does the success of the flatfield suggests it would be something that could be flatfielded out? Please please add into vmc2rgb! --Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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