设计主要涉及了数字图像处理中形态学图像处理的相关知识，如膨胀、腐蚀、开闭运算及测地腐蚀、测地膨胀等内容。-Mainly involved in the design of the knowledge of morphological image processing digital image processing, such as expansion, corrosion, opening and closing computing geodesic corrosion geodesic expansion.