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Activity Number:
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264
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Type:
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Invited
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Date/Time:
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Tuesday, August 8, 2006 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Physical and Engineering Sciences
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| Abstract - #305174 |
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Title:
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Using Image Grand Tour To Explore Multiangle, Multispectral Satellite Imagery
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Author(s):
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Amy Braverman*+ and Edward Wegman and Wendy Martinez and Juergen Symanzik and Brad Wallet
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Companies:
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Jet Propulsion Laboratory and George Mason University and Office of Naval Research and Utah State University and Automated Decisions
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Address:
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Mail Stop 126-347, Pasadena, CA, 91106,
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Keywords:
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remote sensing ; visualization ; exploratory data analysis ; grand tour
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Abstract:
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Remote sensing data are spatial arrays of p-dimensional vectors where each component corresponds to one of p variables. Applying the same R^p to R^d projection to all pixels creates d new images, which may be easier to analyze than the original because d < p. Image grand tour (IGT) steps through the space of projections, and d=3 outputs a sequence of RGB images, one for each step. In this talk, we apply IGT to multiangle, multispectral data from NASA's MISR instrument. MISR views each pixel in four spectral bands at nine view angles. Multiple views detect photon scattering in different directions and are indicative of physical properties of the scene. IGT allows us to explore MISR's data structure while maintaining spatial context; a key requirement for physical interpretation. We report results highlighting the uniqueness of multiangle data and how IGT can exploit it.
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