Sage Journals: Discover world-class research

Abstract

This paper presents a new approach to nep identification and analysis based on image processing methods. A new edge detection method entailing local contrast analysis. which is insensitive to noise, is used to identify neps. The structure of a nep is regarded as consisting of a number of nep elements. Methods for nep element searching, iden tification, and merging are developed. Three nep element distributions are obtained, and these provide detailed information about nep structures. Experimental studies in volve this new technique to investigate the effects of various processing conditions on the incidence of neps in fiber assemblies produced during top manufacture. A com parative study of the new method and the conventional simple threshold method for nep structure identification is also included.

Get full access to this article

View all access options for this article.

References

ASTM Standards. D 1770-94 Standard test method for neps, vegetable matter and colored fibers in wool top.

Dev, Aldrich , Kruger, P.J. , and Turpie, D.W.F. , The Carding and Combing of Wools of Different Fibre Lengths, SAWTRI Technical Report. no. 136, 1970.

Delfosse, P. , Galere, H. , Grignet, J. , Lamaire, P. , Leonard, J. , Longree. M., Muller, J. , and Paquet, B. , Measurement of cleanliness in combed wool by artificial vision and image processing, Proc. of the 9th International Wool Textile Research Conference, Vol. IV. 1990, pp. 97-105.

Gore, C.E. , Lee, C.S.P. , Maston, B.D. , and Smith, C. , A Comparative Study of Various Commercial Scouring Systems, Effect on Top Yield, Noil and Fibre Length Distribution, in " Proc. 8th Int. Wool Text. Res. Conf., Christchurch." vol. 3, 1990, pp. 117-126.

IWTO Standards, IWTO-24-73 ( E ) . General and specific methods for the determination of cleanliness faults in combed wool slivers.

Sonka, M. Hlavac. V. , and Boyle, R. , "Image Processing, Analysis and Machine Vision" Chapman & Hall Computing. London, 1994.

Kreyszig, E. . "Advanced Engineering Mathematics ." John Wiley & Sons, NY, 1993.

Lemaire, P. , Leonard, J. Longree, M. , Muller. J. Galere. H. , and Grignet, J. The OPTOANALYSER, A New Inswment of Cleanliness of Wool Slivers, in "Proc. of 8th Inter. Wool Text. Res. Conf., New Zealand," vol. 3. 1990. pp. 399-411.

Musgrove, J. , The Use of Metallic Wire in High Production Carding, Masters thesis , The University of Leeds, 1969.

10.

Nasr-Aly, M.. The Effect of Card Wire Characteristics on Carding Process. Doctoral thesis, The University of Leeds, 1966.

11.

Robinson, B. , and Lee. C.S.P. , Effect of Scouring Condition on Commercial Carding/Combing Operation in Top Production. Environmental Technical Bulletin . IWS. 1993.

12.

Robinson, B. , and Lee, C.S.P. , Comparative Study of Raw Wool Scouring Systems, Effect of Scouring Conditions on Commercial Carding/Combing Operation in Top Production, Technical Report , IWS, 1992.

13.

Sasser. P.E. , Neps Counted and Sized. Textile Asia (5). 59-63 (1989).

14.

Schlichter, S. , Trutzschler Nep Tester NT: A New Visual Method to Analyse Neps and Interfering Particles, Textile Prax. Int . (9), 930-932 (1991 ).

15.

Turpie, D.W.F. , The Effect of Speed and Production Rate During Carding on Carding and Subsequent Combing Performance, SAWTRI Technical Report, no. 376. 1977.

16.

Townend, P.P. , Nep Formation and Fibre Breakage in Worsted Carding, Doctoral thesis. The University of Leeds. 1944.

17.

Townend, P.P. , and Spiegel, E. , Nep Formation in Worsted Carding , J. Textile Inst. 35, T17-T40 ( 1944).

18.

Townend, P.P. and Spiegel. E. , Fibre Breakage in Worsted Carding , J. Textile Inst. 37, T58-T76 ( 1946).

19.

Townend, P.P. . Nep Formation in Woollen and Worsted Carding , Textile Inst. Ind., 244-249 ( 1970).

20.

Townend, S. A Study of Fibre Breakage in the Conversion of Raw Greasy Wool to Top, Doctoral thesis, The University of Leeds, 1935 .

Nep Structure Identification and Analysis Using Image Processing Methods

Abstract

Get full access to this article

References