Galileo Imagery, I couldn't find a topic not specific to one moon.... |
Galileo Imagery, I couldn't find a topic not specific to one moon.... |
Dec 1 2009, 11:40 AM
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#31
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
False colour? really? I've stretched the saturation to the max in Photoshop on that image, and there's no colour at all, just a slight orange tinge across the entire image. It's slightly colored (aproximately brown color). But this is a problem with adjusting colors on different monitors. On my old CRT it looks fine, but on LCD it looks completely different. I tested this image on LCD and it's colored (try adjusting contrast). -------------------- |
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Dec 1 2009, 01:28 PM
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#32
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Since the original mosaic was monochrome, any colour is false! Looks good, though - probably fairly realistic.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf 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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Dec 1 2009, 01:55 PM
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#33
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Member Group: Members Posts: 562 Joined: 29-March 05 Member No.: 221 |
I believe machi is using false colour to mean artifical colour, not spectral imaging that uses combinations of wavelengths that do not approximate what is seen by the human eye.
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Dec 1 2009, 02:33 PM
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#34
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
Full inline quote removed - ADMIN
Right. This is maybe little terminological problem. Color is entirely artificial. How Phil said, for this mosaic multispectral images don't exist. For comparison, this is multispectral image maked from violet, green and IR images. -------------------- |
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Dec 1 2009, 03:20 PM
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#35
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
A more appropriate phrase would have been 'colourised' rather than 'false colour'. 'false colour' infers that you made the image from multiple filters.
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Dec 25 2009, 08:54 PM
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#36
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Member Group: Members Posts: 104 Joined: 1-June 08 Member No.: 4172 |
As Jason Perry pointed out a couple months back over at the Gish Bar Times, we have recently passed the tenth anniversary of Galileo's I24 flyby, that probe's first close-up look at Io. However, many of the images collected during the flyby had at least one of two anomalies, which the team later characterized here. They were able to create an algorithm to correct the first and simpler of the two anomalies, but were unable to correct the second anomaly. Thus, about a dozen close-in images of Io have been lost. I made an initial attempt at correcting the second anomaly for the example image used in the characterization document, but, although it makes for an interesting exercise in image processing, it's completely useless in its current form for anything resembling scientific analysis...
original: attempted restoration: The images themselves are here, with those containing an anomaly in the "garbled" directory and corrected versions of those with just the first anomaly in the "repaired" directory. |
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Dec 26 2009, 04:12 AM
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#37
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Impressive!
By the way, I don't think I ever have seen the documentation for the second anomaly. Very interesting! -------------------- |
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Dec 28 2009, 06:59 PM
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#38
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
I posted a short Europa-related blog entry yesterday.
http://planetimages.blogspot.com/2009/12/n...-of-europa.html -------------------- |
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Jan 7 2010, 11:53 AM
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#39
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Here are two rough color views from Galileo. Valhalla impact basin on Callisto:
Ganymede mosaic consisting of 4 footprints: That's the Enki Catena crater chain at lower right. There exists a fifth footprint that I *think* fits to the lower left one, but there's no overlap to match them and I omitted it here. -------------------- |
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Jan 21 2010, 10:59 AM
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#40
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
What a difference rotating an image can make:
From my blog post: The mosaic above shows a portion of the northeastern margin of Chaac Patera, a volcanic depression on the anti-Jupiter hemisphere of Io. Click the image for a full-resolution version. The terrain to the upper left is the hummocky plains that make up the upper level of the depression Chaac sits in. The terrain to the lower right is the floor of Chaac Patera, consisting of overlapping, thin silicate flows. The margin itself is quite steep, with slopes approach 70 degrees on the right hand side. On the left hand side, mass wasting has produced a two-tone talus apron at the base of the slope. This mass wasting seems to be the result of more extensive slope failure (see the broken off section of massive lava on the far left edge of the image). These images were taken during the Galileo spacecraft's February 2000 flyby of Io. The pixel scale is 7 meters per pixel. See PIA02551 to see how these images are normally shown... Rotate the image 90 degrees and suddenly the geologist part of my brain starts saying, "Oh now this makes A LOT more sense!" -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Jan 21 2010, 01:06 PM
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#41
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
Amazing! I'm not geologist, but I have seen this image many times (in raw form) and now it looks really more understandable to me. Fantastic cliff!
Let's Look at Io from a Different Angle! -------------------- |
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Jan 21 2010, 02:53 PM
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#42
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
or a slightly different take, simulating the view one might have out of a porthole on passing space cruiser . . .
-------------------- Dr. Paul Schenk, Lunar and Planetary Institute, Houston TX
http://stereomoons.blogspot.com; http://www.youtube.com/galsat400; http://www.lpi.usra.edu/science/schenk/ |
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Jan 22 2010, 01:10 PM
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#43
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
and a different scene . . . this is the eroded plains shot north of the equator, for which we have no context imaging. it shows a dark smooth plataeu in the foreground and complex plains surrounding it. these palins are probably overlapping flows and erosional debris slides of some sort. -------------------- Dr. Paul Schenk, Lunar and Planetary Institute, Houston TX
http://stereomoons.blogspot.com; http://www.youtube.com/galsat400; http://www.lpi.usra.edu/science/schenk/ |
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Mar 2 2010, 03:28 AM
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#44
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
On a related note, look at what made it onto Wikipedia's front page today!
http://en.wikipedia.org/wiki/Callisto_%28moon%29 Rather a coincidence considering the recent blog post by Emily..... |
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Mar 11 2010, 10:39 PM
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#45
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Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
I had this on my blog a few days ago, but I've gotten around to putting together a few mosaics of Europa from 1998 and 1999 by Galileo:
15ESREGMAP01 15ESREGMAP02 Description at http://www.gishbartimes.org/2010/03/two-mo...pa-mosaics.html 17ESREGMAP01 17ESAGENOR03 17ESSOUTHP01 17ESREGMAP02 Description at http://www.gishbartimes.org/2010/03/and-no...completely.html 19ESRHADAM01 Description at http://www.gishbartimes.org/2010/03/19esrh...-of-europa.html -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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