# cupyx.scipy.ndimage.grey_opening¶

cupyx.scipy.ndimage.grey_opening(input, size=None, footprint=None, structure=None, output=None, mode='reflect', cval=0.0, origin=0)

Calculates a multi-dimensional greyscale opening.

Parameters
• input (cupy.ndarray) – The input array.

• size (tuple of ints) – Shape of a flat and full structuring element used for the greyscale opening. Optional if footprint or structure is provided.

• footprint (array of ints) – Positions of non-infinite elements of a flat structuring element used for greyscale opening. Non-zero values give the set of neighbors of the center over which opening is chosen.

• structure (array of ints) – Structuring element used for the greyscale opening. structure may be a non-flat structuring element.

• output (cupy.ndarray, dtype or None) – The array in which to place the output.

• mode (str) – The array borders are handled according to the given mode ('reflect', 'constant', 'nearest', 'mirror', 'wrap'). Default is 'reflect'.

• cval (scalar) – Value to fill past edges of input if mode is constant. Default is 0.0.

• origin (scalar or tuple of scalar) – The origin parameter controls the placement of the filter, relative to the center of the current element of the input. Default of 0 is equivalent to (0,)*input.ndim.

Returns

The result of greyscale opening.

Return type

cupy.ndarray