Efficient subpixel image registration algorithms - PubMed (original) (raw)

. 2008 Jan 15;33(2):156-8.

doi: 10.1364/ol.33.000156.

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Efficient subpixel image registration algorithms

Manuel Guizar-Sicairos et al. Opt Lett. 2008.

Abstract

Three new algorithms for 2D translation image registration to within a small fraction of a pixel that use nonlinear optimization and matrix-multiply discrete Fourier transforms are compared. These algorithms can achieve registration with an accuracy equivalent to that of the conventional fast Fourier transform upsampling approach in a small fraction of the computation time and with greatly reduced memory requirements. Their accuracy and computation time are compared for the purpose of evaluating a translation-invariant error metric.

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