wradlib.clutter.filter_gabella_a

wradlib.clutter.filter_gabella_a(img, wsize, tr1, cartesian=False, radial=False)

First part of the Gabella filter looking for large reflectivity gradients.

This function checks for each pixel in img how many pixels surrounding it in a window of wsize are by tr1 smaller than the central pixel.

Parameters:
  • img (array_like) – radar image to which the filter is to be applied
  • wsize (int) – Size of the window surrounding the central pixel
  • tr1 (float) – Threshold value
  • cartesian (bool) – Specify if the input grid is Cartesian or polar
  • radial (bool) – Specify if only radial information should be used
Returns:

output (array_like) – an array with the same shape as img, containing the filter’s results.

See also

filter_gabella - the complete filter

filter_gabella_b - the second part of the filter

Examples

See Clutter detection using the Gabella approach.