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Sampling and the Fast Fourier Transform

  • Earl J. Kirkland
Chapter
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Abstract

This chapter takes a small detour and discusses some numerical approximations that will be necessary to theoretically compute electron microscopy images. Specifically, digital sampling (pixels and levels) and all the important fast Fourier transform (FFT) are introduced. The FFT will be the principle tool to speed up later calculation. If you are familiar with these topics, this chapter may be skipped.

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Earl J. Kirkland
    • 1
  1. 1.School of Applied & Engineering PhysicsCornell UniversityIthacaUSA

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