通过反复从对象中移除边缘像素，直到它们被减少到单像素宽的骨架，二值图像从而被细化得到根中轴(Smucker et al., 1987 Tanaka et al., 1995)。建立在NHI图像上的骨架化命令是用于此过程（见于Fig. 7(ii)）和计算骨架像素的数量。-The binary image was thinned to get the medial axis of roots by repeatedly removing edge pixels from the objects un