Virtual Viking, Images and animations of the Viking landing sites |
Virtual Viking, Images and animations of the Viking landing sites |
Sep 4 2008, 02:29 PM
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Solar System Cartographer Group: Members Posts: 10256 Joined: 5-April 05 From: Canada Member No.: 227 |
In the past we've had some good Viking images here. Soon - all too soon - we will not have Phoenix any more, but despair not! Now we can re-live Viking by playing with old images. They can be searched by sol at the PDS.
As an example, I've made a composite of the very last Surface Sampler activities at either Viking site. This is work done on Viking 2 sol 957 and imaged on sol 957 and 959. (someone can animate it if they like!) We see two separate trenching activities at the same place, and a soil dump (bottom) and a conical soil pile made by the second dump (middle). (more obvious in an animation, I just can't make one on this machine). 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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Nov 21 2009, 02:41 PM
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#2
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Senior Member Group: Members Posts: 1670 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Yes I can appreciate the hi-res color mosaics might be challenging, yet I believe the effort may be worthwhile. The hi-res is three times the angular resolution of the low-res so there is a significant gain in detail (9 times the pixels). I recall back in 1977 that this type of combining was done at least in the context of individual hi-res images and it looked pretty good. It was done at JPL/IPL using VICAR so any geometric corrections would have been doable (e.g. with the GEOCAM program).
I wonder if the original imagery can still be reprocessed with VICAR somehow. Otherwise something like IDL or other languages can fairly easily correct for camera tilt. The other camera distortions might require something like what VICAR/GEOCAM did if they are significant. If there are offsets in shadows then maybe a fancier program can be put together that would use "nearby" color information when needed. Looking online, here are some hi-res/low-res combo color images from Mary A. Dale-Bannister. Here's another one from Ricardo Nunes who also worked with Ted Stryk's super-resolution images as mentioned in post #5 of this thread. The black and white mosaics do have fairly consistent lighting, so I'm checking whether there are any wide angle panoramic color images (or mosaics) from similar times of day where this can be attempted. Using Phil's PDS link in post #19 I was able to construct this fairly wide angle low-res color view. I can see the lighting and geometry issues when matching to the hi-res mosaic. The missing vertical lines need to be filled in as well - there used to be a VICAR program called FILLVL to do this. That's what I've found so far. Steve |
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