形态滤波程序 包括 腐蚀 膨胀 开闭 闭开运算 还包括一个结构元素是圆盘形的实例，适合初学者对于形态滤波的学习。-Morphological filtering procedures include corrosion expansion opening and closing operation also includes a structural element is a disc shaped example, suitable for beginners to learn morphol