Efficient subpixel image registration algorithms.

@article{GuizarSicairos2008EfficientSI,
  title={Efficient subpixel image registration algorithms.},
  author={Manuel Guizar‐Sicairos and Samuel T. Thurman and James R. Fienup},
  journal={Optics letters},
  year={2008},
  volume={33 2},
  pages={
          156-8
        }
}
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… 
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