2016
DOI: 10.1117/12.2232178
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Rotation and translation registration of bandlimited interferometric images using a chirp z-transform

Abstract: Image reconstruction algorithms for wide-field spatio-spectral interferometry require knowledge of registration parameters associated with low-resolution image measurements at various baseline orientations, such that the images can be registered to within the fine resolution of the final desired image. We have developed an image registration procedure that combines a nonlinear optimization algorithm with the sub-pixel precision of chirp z-transform resampling, particularly for rotation and translation, of band… Show more

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“…First, we take the average data frame from each datacube. We then use a chirp z-transform image registration approach 20 to register all the images to the image from the first datacube in the dataset. The rotation angle between measurements is known very well because source rotation is performed digitally prior to image projection, but there are remaining image translations that must be recovered.…”
Section: Processing Of Wiit Datamentioning
confidence: 99%
“…First, we take the average data frame from each datacube. We then use a chirp z-transform image registration approach 20 to register all the images to the image from the first datacube in the dataset. The rotation angle between measurements is known very well because source rotation is performed digitally prior to image projection, but there are remaining image translations that must be recovered.…”
Section: Processing Of Wiit Datamentioning
confidence: 99%