Digital image processing method of yarn black board

Introduces a kind of digital processing of yarn black board on the basis of computer image manipulation.In view of existing hairiness and scratch in the yarn black board,through some methods such as smoothness processing,threshold value division and image repairing,can come up with a clear digital image without noise points and exactly measure the yarn diameter.Comparing with the actual diameter of yarn,the computed yarn diameter accords with the actual diameter,which proves that the yarn diameter measured by image processing method is accurate,precisely reflects appearance features of yarn such as slubs,neps,nips,and establishes the foundation for the automatic assessment of the yarn black board.