xrspatial.morphology.morph_opening#

xrspatial.morphology.morph_opening(agg, kernel=None, boundary='nan', name='opening')[source]#

Apply morphological opening (erosion then dilation) to a 2D raster.

Opening removes small bright features and salt noise while preserving the overall shape of larger structures.

Parameters:

  • agg (xarray.DataArray) – 2D raster of numeric values.

  • kernel (numpy.ndarray or None) – 2D structuring element with odd dimensions. Defaults to a 3x3 square.

  • boundary (str, default 'nan') – Edge handling: 'nan', 'nearest', 'reflect', or 'wrap'.

  • name (str, default 'opening') – Name for the output DataArray.

Returns:

Opened raster.

Return type:

xarray.DataArray

Examples

>>> from xrspatial.morphology import morph_opening
>>> cleaned = morph_opening(binary_mask)