Juno Perijove 43, July 5, 2022 |
Juno Perijove 43, July 5, 2022 |
Sep 25 2022, 03:41 PM
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#31
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Senior Member Group: Members Posts: 2997 Joined: 30-October 04 Member No.: 105 |
That is exactly what I was referring to when I discussed the appearance of relief in pairs of Juno images. Any two images of a point taken along a flight path create a stereo pair, and can be viewed in stereo.
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Sep 25 2022, 05:16 PM
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#32
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Senior Member Group: Members Posts: 2504 Joined: 13-September 05 Member No.: 497 |
Any [two] images of a point taken along a flight path create a stereo pair, and [can] be viewed in stereo. Sure, subject to the caveats that every Junocam "image" is a sequence of framelets taken at slightly different times from slightly different locations, the clouds themselves are moving dynamically, and the orientation of epipolar lines is complex and variable across the FOV. See Gerald's slides for a taste of all the complexities involved and all the work left to do. I'm don't think it's happening here, but I've seen lots of "stereo" images where there was some factor that wasn't considered, and people were just deluding themselves into seeing relief. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Sep 26 2022, 09:08 AM
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#33
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Senior Member Group: Members Posts: 2997 Joined: 30-October 04 Member No.: 105 |
It may well be that these Junocam images are giving the impression of stereo relief, but in reality we are not looking a 2D surface. There has to be high clouds grading down to low clouds.
--Bill -------------------- |
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Sep 26 2022, 09:45 PM
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#34
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Member Group: Members Posts: 909 Joined: 4-September 06 From: Boston Member No.: 1102 |
I think mcaplinger may have been referring to shape from shade, not Gerald's work.
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Sep 26 2022, 10:39 PM
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#35
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Senior Member Group: Members Posts: 2504 Joined: 13-September 05 Member No.: 497 |
I think mcaplinger may have been referring to shape from shade, not Gerald's work. No, but I don't know what Bill was talking about. Sure, one would expect some relief from clouds, and sure, stereo could see that in theory. Don't even get me started about shape from shading. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Dec 23 2022, 03:27 PM
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#36
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Member Group: Members Posts: 696 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Looks like no-one has posted this lovely JIRAM image yet, so here it is for completeness. It would be great to have IDs for the various volcanoes- in particular, what's the extended feature right on the limb at 10:30 o'clock?
Release here. |
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Dec 23 2022, 04:00 PM
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#37
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Senior Member Group: Moderator Posts: 3226 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Merged that image with a Voyager/Galileo basemap. The extended hotspot at 10:30 is Loki on the limb I should also post some of my PJ41 products here as well… -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Dec 23 2022, 04:16 PM
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#38
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Member Group: Members Posts: 696 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
I knew you'd have the answer, VP! Thanks. Makes sense that it's Loki- not many volcanoes would have the power to glow so brightly at that emission angle.
John |
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