Image registration using rotation tolerant correlation method
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United States of America Patent
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Apr 10, 2012
Grant Date -
Apr 8, 2010
app pub date -
Oct 8, 2008
filing date -
Oct 8, 2008
priority date (Note) -
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Abstract
A method for correlating or finding similarity between two data sets. The method can be used for correlating two images with common scene content in order to find correspondence points between the data sets. These correspondence points then can be used to find the transformation parameters which when applied to image 2 brings it into alignment with image 1. The correlation metric has been found to be invariant under image rotation and when applied to corresponding areas of a reference and target image, creates a correlation surface superior to phase and norm cross correlation with respect to the correlation peak to correlation surface ratio. The correlation metric was also found to be superior when correlating data from different sensor types such as from SAR and EO sensors. This correlation method can also be applied to data sets other than image data including signal data.
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