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Multiply overlapping Mars imagery, Looking for 5 or more images of same spot
elakdawalla
post Sep 24 2010, 09:34 PM
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A reader (Bill Green, a retired JPL guy who helped develop MIPL) alerted me to a recent article in IEEE Computer, "Aerial Computer Vision for a 3D Virtual Habitat" (subscription only, I'm afraid) that describes a method that they refer to as the "high overlap paradigm" for developing extremely high-resolution digital elevation models by using many aerial photos from many look angles. I contacted the paper's first author, Franz Leberl, to see if he was interested in attempting to apply his method to images from Mars, and the answer was: Yes, he's very interested. So my question is, where on Mars do we have sets of highly overlapping images? Here's what Leberl said he needed:
QUOTE
For a fully automated process that associates a surface elevation with each pixel, we need 5 or so images of each terrain point. If it is more, that is even better. If you have a focal length and location of the principal point, that would be helpful also. We do not need any data about the camera positions; but if you had such data, we would want to compare our results to those you have. And if you also had previous results in the form of a digital surface model created by traditional two-image stereo, we could use this as well for an analysis and comparison.
Can the hivemind of UMSF help me connect Leberl with the data he would need to make some seriously detailed DTMs?


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tanjent
post Sep 27 2010, 03:11 PM
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Without having access to the article, couldn't one or more views from a high point be combined with the satellite views? IIRC this was the basis for revised estimates on the height of McCool hill and other topographic features from Spirit's vicinity. I guess the ability to factor in information from the horizon lines might be considered cheating in the problem they set out to solve.
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