polyTEM.image.fft.gaussian_q_filter

polyTEM.image.fft.gaussian_q_filter(q, sigma_q, sigma_th, M, dx)

Generates gaussian filter in Fourier space for designated q center and bandwidth.

Written by Camila

Parameters:

  • q – q vector in angstroms

  • sigma_q – q bandwidth in angstroms

  • sigma_th – theta bandwidth in degrees

  • M – size of output fourier transform image

  • dx – HRTEM image resolution in Angstroms/pixel

Returns:

numpy array of size (NN, NN) with gaussian filter. Normalized by area (sum = 2).

Return type:

matrix