def _thin_cond_g3_prime():
    "\n    Thinning morphological operation; condition G3'\n    :return: a LUT index mask\n    "
    return ((((lut_masks_one(6) | lut_masks_one(7)) | lut_masks_zero(4)) & lut_masks_one(5)) == 0)
Thinning morphological operation; condition G3'
:return: a LUT index mask
def _thin_cond_g3_prime():
    "\n    Thinning morphological operation; condition G3'\n    :return: a LUT index mask\n    "
    return ((((lut_masks_one(6) | lut_masks_one(7)) | lut_masks_zero(4)) & lut_masks_one(5)) == 0)