Absolute frequency units `f_a`

For the pixel size p [Å], spatial frequency `f_s` [1/Å] is related to absolute frequency `f_a` by:

For an image size n pixels sampled at p Å, k'th Fourier pixel (0<=k<=n/2) is related to frequency by:

Resolution r [Å] (defined as inverse of spatial frequency) is:

For examples of code in which Fourier pixels are handled check sparx/filter.cpp.

absolute_frequency_units (last edited 2013-07-01 13:12:24 by localhost)