BGlib.gmode.proc.fft.get_2d_gauss_lpf

BGlib.gmode.proc.fft.get_2d_gauss_lpf(radius_mat, filter_width)[source]

Builds a 2D, radially symmetric, low-pass Gaussian filter based on the provided radius matrix. The corresponding high pass filter can be built simply by subtracting the resulting low-pass filter from 1.

Multiply the output of this function with the (shifted) fft of an image to apply the filter.

Parameters:

  • radius_mat (2d numpy float array) – A [NxM] matrix of the same size as the image that this filter will be applied to

  • filter_width (float) – Size of the filter

Returns:

gauss_filt – matrix with a single gaussian peak at the center of the matrix.

Return type:

2D numpy float array