watershed.py 文件源码

def neighbors(shape, conn=1):
    dim = len(shape)
    block = generate_binary_structure(dim, conn)
    block[tuple([1]*dim)] = 0
    idx = np.where(block>0)
    idx = np.array(idx, dtype=np.uint8).T
    idx = np.array(idx-[1]*dim)
    acc = np.cumprod((1,)+shape[::-1][:-1])
    return np.dot(idx, acc[::-1])