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[:rtshgkb:], [:prepi:] [[rtshgkb]], [[prepi]]

Name

prepg - prepare 2-D image for rotation/shift using gridding method.

Usage

  • nx = image.get_xsize()
  • kb = kbt(nx)
  • imageft = prepg(image, kb)

Input

image
input image that is going to be rotated and shifted using rtshgkb
kb
interpolants (tabulated Kaiser-Bessel function)

Output

imageft
image prepared for gridding rotation and shift

Method

Fourier space interpolation.

Reference

Penczek, P.A., Renka, R. and Schomberg, H.: Gridding-based direct Fourier inversion of the three-dimensional ray transform. J. Opt. Soc. Am. A. 21:499-509, 2004.

Author / Maintainer

Pawel A. Penczek

Keywords

category 1
FUNDAMENTALS
category 2
FOURIER

Files

fundamentals.py

See also

rtshgkb, prepi

Maturity

stable
works for most people, has been tested; test cases/examples available.

Bugs

None. It is perfect.

prepg (last edited 2013-07-01 13:12:53 by localhost)