Alignment and Sub-pixel Interpolation of Images using Fourier Methods |
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Authors: | C A Glasbey G W A M Van Der Heijden |
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Institution: |
a Biomathematics and Statistics Scotland, Edinburgh, UK
b Biometris, Wageningen, The Netherlands |
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Abstract: | A method is proposed for both estimating and correcting a translational mis-alignment between digital images, taking account of aliasing of high-frequency information. A parametric model is proposed for the power- and cross-spectra of the multivariate stochastic process that is assumed to have generated a continuous-space version of the images. Parameters, including those that specify misalignment, are estimated by numerical maximum likelihood. The effectiveness of the interpolant is confirmed by simulation and illustrated using multi-band Landsat images. |
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Keywords: | Aliasing coherency complex Gaussian distribution cross-spectrum landsat image phase spectrum power spectrum sub-pixel |
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