پديد آورنده :
شهسواري، فريد
عنوان :
بررسي ارتباط نايكنواختي هاي جرمي نخ پود با عيوب سطحي پارچه با استفاده از روش پردازش تصوير
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
تكنولوژي نساجي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
چهارده، 98ص.: مصور، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد مشاور :
عبدالكريم حسيني
توصيفگر ها :
طيف توان زاويه اي , منحني واريانس سطح
تاريخ نمايه سازي :
20/2/91
استاد داور :
داريوش سمناني، محسن شنبه
تاريخ ورود اطلاعات :
1396/10/06
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Investigation on the Relation Between the Mass Irregularities of Weft Yarn and Surface Defects of Fabric Using an Image Analysis Technique Farid Shahsavari farid shahsavari85@gmail com Date of Submission 21 02 2012 Department of Textile Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor Mohammad Ghane m ghane@cc iut ac irAbstractUnevenness of woven fabric results from irregularity of the yarn used as well as from theprocess of its manufacture weaving These unevenness and irregularities appear on fabric andwill affect various fabric properties In order to investigation of weft yarn mass irregularitieson fabric surface unevenness and defects various plain fabrics samples were prepared inwhich they differ only in weft yarn mass irregularity One of the effective factors on fabricsurface unevenness is yarn protrusion in fabric structure The protruding yarn from the bodyof a fabric is an important indicator of the mechanism of yarn interaction within the fabric anda predictor of fabric surface properties The factors affecting protruding yarn are shown to fallin two main groups one governing the structural characteristics of fabric and the other one the mechanical properties of yarn In this work first relationship between weft yarn massirregularities and fabric surface unevenness was investigated using angular power spectrumcurve a measure of yarn protrusion in fabric structures The results showed a high significantcorrelation was observed between these two parameters since fabric surface unevenness in that fabric image as the brightness variation of fabricimage is directly related to the fabric surface unevenness Thus it can be pointed out thatcoefficient of variation between image gray levels is a measure of fabric surfaceunevenness The image of fabric was first converted into grey scale The image is divided intosquare fields so called unit area and variation of greyness degree depending on area ofsquare field was calculated The graphing gray levels coefficient of variation versus unit areawas prepared the results shows that fabric area variation curve indeed is a representation offabric surface unevenness By comparing samples area variation curve it was observed that themore mass irregularities and coefficient of variation at weft yarn the more its area variationcurve which means to more fabric surface unevenness Finally an unevenness criterion wasintroduced quantitative evaluation in order to fabric surface unevenness Keywords mass irregularity angular power spectrum curve area variation curve unit area
استاد مشاور :
عبدالكريم حسيني
استاد داور :
داريوش سمناني، محسن شنبه
