Maps morphological operation type to function

        :param morph_type: Morphological operation type
        :type morph_type: MorphologicalOperations
        :return: function

def get_operation(cls, morph_type):
        """ Maps morphological operation type to function

        :param morph_type: Morphological operation type
        :type morph_type: MorphologicalOperations
        :return: function
        """
        return {
            cls.OPENING: skimage.morphology.opening,
            cls.CLOSING: skimage.morphology.closing,
            cls.DILATION: skimage.morphology.dilation,
            cls.EROSION: skimage.morphology.erosion,
            cls.MEDIAN: skimage.filters.rank.median
        }[morph_type]