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An improved method for precise automatic co-registration of moderate and high-resolution spacecraft imageryImprovements to the automated co-registration and change detection software package, AFIDS (Automatic Fusion of Image Data System) has recently completed development for and validation by NGA/GIAT. The improvements involve the integration of the AFIDS ultra-fine gridding technique for horizontal displacement compensation with the recently evolved use of Rational Polynomial Functions/ Coefficients (RPFs/RPCs) for image raster pixel position to Latitude/Longitude indexing. Mapping and orthorectification (correction for elevation effects) of satellite imagery defies exact projective solutions because the data are not obtained from a single point (like a camera), but as a continuous process from the orbital path. Standard image processing techniques can apply approximate solutions, but advances in the state-of-the-art had to be made for precision change-detection and time-series applications where relief offsets become a controlling factor. The earlier AFIDS procedure required the availability of a camera model and knowledge of the satellite platform ephemeredes. The recent design advances connect the spacecraft sensor Rational Polynomial Function, a deductively developed model, with the AFIDS ultrafine grid, an inductively developed representation of the relationship raster pixel position to latitude /longitude. As a result, RPCs can be updated by AFIDS, a situation often necessary due to the accuracy limits of spacecraft navigation systems. An example of precision change detection will be presented from Quickbird.
Document ID
20060044154
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Bryant, Nevin A.
Logan, Thomas L.
Zobrist, Albert L.
Date Acquired
August 23, 2013
Publication Date
May 5, 2006
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: American Society of Photgrammetry and Remote Sensing (ASPRS) Annual Meeting
Location: Reno, NV
Country: United States
Start Date: May 5, 2006
Distribution Limits
Public
Copyright
Other
Keywords
co-registration
Rational Polynomial Coefficients (RPC)
images

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