Discussing reflecting model of yarn

Purpose This paper deals with the reflecting rays of yarn. Design/methodology/approach The modeling, assuming that the fibers are arranged around the surface of elliptic yarn and reflecting rays of yarn are consisted of reflecting rays of fibers, is established using mathematical method. We can get a distributional curve of reflecting rays by this method. Findings It was found that because resolution was an important parameter in measurement equipment, the result of modeling must be filtered. It gives fundamental theory for selecting resolution and we also provide other useful value for selecting equipment of image processing. Resolution is an important parameter for measurement equipment. We have provided the minimum resolution for yarn. When we do image processing for yarn, we can get correct information of yarn by image processing with the minimum resolution and over. Research limitations/implications The result using different measurement equipment does not show the same result, therefore, the model must be filtered according to resolution. Orginality/value Although previous researches have used the reflecting property of yarn, little work that analyzed the reflecting model of yarn and the relationship between resolution and reflecting property has been achieved. We present a method of analyzing reflection of yarn.