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Analysis of Blend Irregularity in Yarns Using Image Processing: Part I: Fundamental Investigation of Model Yarns

In this research, a computer image processing system is used to evaluate the blend state (fiber arrangement) or uneven distribution in blended yarns. Part I presents an investigation of the precision and effectiveness of the system using three kinds of model yarns, whose numbers of component filaments, blend ratios, and blend states have been predetermined. The method of image input, various image processing techniques, and a statistical analysis are examined based on the model yarns. The results show clearly that with this system, the diameter and area of one fiber can be measured, the blend ratio of black and white fibers in a short sample length can be accurately determined, and the size of a cluster can be quantitatively evaluated.