Efficient subpixel image registration algorithms.

  title={Efficient subpixel image registration algorithms.},
  author={Manuel Guizar‐Sicairos and Samuel T. Thurman and James R. Fienup},
  journal={Optics letters},
  volume={33 2},
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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Color online) Computation time with respect to (a) image size ( = 25 for DFT algorithms) and (b) upsampling factor for 512ϫ 512 images

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