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Title: Digital image processing and illumination techniques for yarn characterization
Authors: Ozkaya, Yasar A.
Acar, Memis
Jackson, Michael R.
Issue Date: 2005
Publisher: Copyright 2005 Society of Photo Optical Instrumentation Engineers.
Citation: OZKAYA, Y.A., ACAR, M. and JACKSON, M.R., 2005. Digital image processing and illumination techniques for yarn characterization. Journal of Electronic Imaging, 14(2), 023001.
Abstract: This paper describes various illumination and image pro- cessing techniques for yarn characterization. Darkfield and back-lit illuminations are compared in terms of depth of field tolerance and image quality. Experiments show that back-lit illumination is superior in terms of depth of field tolerance and contrast. Three different back-lit illumination configurations are studied: one simply employ- ing a light source placed behind the yarn, the other incorporating a field lens to increase the light intensity passing through the aperture, and the third using a mirror placed at 45° to the optical axis to enable imaging of two orthogonal views of the yarn core. Problems in defining the hair–core boundaries in high resolution yarn pictures are addressed and a filtering process is introduced for back-lit im- ages. A comparison of the diameter and diameter coefficient of variation percentage measurements for different illumination and im- age processing techniques is given for several yarn samples. The data are also correlated with Premier 7000 diametric irregularity tester and Uster Tester 3 irregularity measurements. © 2005 SPIE and IS&T.
Description: This paper was accepted for publication in the Journal of Electronic Imaging and the definitive published version is available at: http://dx.doi.org/10.1117/1.1902743. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Version: Published
DOI: 10.1117/1.1902743
URI: https://dspace.lboro.ac.uk/2134/19368
Publisher Link: http://dx.doi.org/10.1117/1.1902743
ISSN: 1017-9909
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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