binary-opening

binary_opening

skimage.morphology.binary_opening(image, selem=None, *args, **kwargs) [source]

Return fast binary morphological opening of an image.

This function returns the same result as greyscale opening but performs faster for binary images.

The morphological opening on an image is defined as an erosion followed by a dilation. Opening can remove small bright spots (i.e. “salt”) and connect small dark cracks. This tends to “open” up (dark) gaps between (bright) features.

Parameters:	image : ndarray Binary input image. selem : ndarray, optional The neighborhood expressed as a 2-D array of 1’s and 0’s. If None, use cross-shaped structuring element (connectivity=1). out : ndarray of bool, optional The array to store the result of the morphology. If None is passed, a new array will be allocated.
Returns:	opening : ndarray of bool The result of the morphological opening.