The power of HiRISE |
The power of HiRISE |
Oct 9 2008, 08:04 PM
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#101
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Busy preparing a new Outreach talk here, and have been trying to find some images to illustrate the "power" of HiRISE for a non-technical audience. Playing about with - sorry, carefully looking at the images on - the addictive Mars Global Data site I found a cute landslide on Xanthe Terra that does the trick nicely. Using the IAS Viewer you can zoom in on the boulders carried down the slope by the landslide and even see cracks and splits in them... unbelievable...!
Anyone else got any fave examples? -------------------- |
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Jul 29 2010, 02:21 PM
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#102
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Somewhere recently we were discussing the possibility of using super-resolution with scanning cameras, specifically HiRISE. I did an experiment using pictures of the old Spirit lander. I tried finding images of other places at Meridiani - Beagle crater, Eagle crater... but the difficulty was finding multiple high quality images of the same location with comparable lighting and atmospheric conditions. Despite what you might think there are not many places where the coverage is OK for this. For instance, Opportunity can be illuminated from either the north or the south at different seasons, and that wrecks any chance of combining images effectively. If you compare the three raw images you can see how each one samples the target slightly differently.
Anyway, here's a composite of five images of the Spirit lander, compared with the three best images of the set (the other two are less satisfactory in image quality and lighting). I'm using the versions which are not map projected, but I have then had to do some work myself to register them reasonably well. The composite was made by enlarging to 4x the original scale and registering, but without the addition of sharpening any layers. It shows some promise, I think, but the process would benefit from specially targeted images taken at the same season. Not very likely in my opinion! 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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