说明：  分水岭算法VC源代码和详细说明：梯度图像、标记图像的预处理，连通区域的标定，最后找到分水岭。详细说明梯度图像，标定图像，输出图像的初始化，绝对可用。
(watershed algorithm source code and detailed description : gradient image, marking image preprocessing, Calibration of regional connectivity, finally found watershed. Gradient detailed images, image calibration, image output initialization definitely available.)