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|Title: ||Digital image processing and illumination techniques for yarn characterization|
|Authors: ||Ozkaya, Yasar A.|
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.|
|Publisher Link: ||http://dx.doi.org/10.1117/1.1902743|
|Appears in Collections:||Published Articles (Mechanical, Electrical and Manufacturing Engineering)|
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