wradlib.clutter.filter_window_distance¶
- wradlib.clutter.filter_window_distance(img, rscale, fsize=1500, tr1=7)¶
2d filter looking for large reflectivity gradients.
This function counts for each bin in
img
the percentage of surrounding bins in a window of half sizefsize
which are nottr1
smaller than the central bin. The window is defined using geometrical distance.- Parameters:
img (
numpy.ndarray
) – 2d polar data to which the filter is to be appliedrscale (
float
) – range [m] scale of the polar gridfsize (
int
) – Half-size [m] of the square window surrounding the central pixeltr1 (
float
) – Threshold value
- Returns:
output (
numpy.ndarray
) – an array with the same shape asimg
, containing the filter’s results.
See also