wradlib.util.filter_window_polar(img, wsize, fun, rscale, random=False)

Apply a filter of an approximated square window of half size fsize on a given polar image img.

Parameters
• img (numpy.ndarray) – 2d array of values to which the filter is to be applied

• wsize (float) – Half size of the window centred on the pixel [m]

• fun (string) – name of the 1d filter from scipy.ndimage

• rscale (float) – range [m] scale of the polar grid

• random (bool) – True to use random azimuthal size to avoid long-term biases.

Returns

output (numpy.ndarray) – Array with the same shape as img, containing the filter’s results.