Methods and systems for registering image data
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United States of America Patent
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Jan 23, 2001
Grant Date -
N/A
app pub date -
Dec 15, 1998
filing date -
Apr 29, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and systems for estimating a correction angle that rotationally aligns a first polar centered image with a second polar centered image, wherein the first and second polar centered images includes values on a polar grid having evenly spaced polar angle coordinates for each of at least one radial distance coordinate, include the following steps: calculating a polar cross-power spectrum for the first and second polar centered images, the polar cross-power spectrum comprising a phase profile having at least polar angular frequency coordinates; and fitting a linear function of the angular frequency coordinate to the phase profile of the polar cross-power spectrum to determine the correction angle.
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