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29 January 2014 Fast Fourier transformation resampling algorithm and its application in satellite image processing
Zhenping Li
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Journal of Applied Remote Sensing, Vol. 8, Issue 1, 083683 (January 2014). https://doi.org/10.1117/1.JRS.8.083683
Abstract
The image resampling algorithm, fast Fourier transformation resampling (FFTR), is introduced. The FFTR uses a global function in the Fourier expansion form to represent an image, and the image resampling is achieved by the introduction of a phase shift in the Fourier expansion. The comparison with the cubic spline interpolation approach in the image resampling is presented, which shows that FFTR is more accurate in the satellite image resampling. The FFTR algorithm is also generally reversible, because both the resampled and its original images share the same Fourier spectrum. The resampling for the images with hot spots is discussed. The hot spots in an image are the pixels with the second-order derivatives that are order of magnitude larger than the average value. The images with the hot spots are resampled with the introduction of a local Gaussian function to model the hot spot data, so that the remaining data for the Fourier expansion are continuous. Its application to the infrared channel image of Geostationary Operational Environmental Satellite Imager, to mitigate a diurnally changing band co-registration, is presented.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Zhenping Li "Fast Fourier transformation resampling algorithm and its application in satellite image processing," Journal of Applied Remote Sensing 8(1), 083683 (29 January 2014). https://doi.org/10.1117/1.JRS.8.083683
Published: 29 January 2014
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Cited by 2 scholarly publications.
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KEYWORDS
Satellites
Satellite imaging
Earth observing sensors
Image processing
Infrared imaging
Phase shifts
Imaging systems
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