Routine measurement of microfiber diameter and its distribution are carried out by manual methodusing ruler to gain fiber diameters from SEM images [4].This process is very time-consuming and operator consistency and fatigue may reduce the accuracy [5], so it is necessary to measure the fiber diameters quickly and accurately.
At present, there has been no successful method for the automated measurement of microfiber diameter in melt-blown web at present [6-15]. Main difficulties are: 1) how to obtain the distinct images which are suitable for automatic analysis; 2) how to design the particular algorithms that are practical for the processing of melt-blown nonwovens images.