Measurement of foreign matter in fibre assemblies

A method of measuring the amount and type of foreign matter in a fibre assembly by scanning the assembly with a video camera and allocating a brightness or colour value to each pixel of the scan. The scanning preferably occurs with transmitted light. The number of pieces of foreign matter being dete...

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Bibliographische Detailangaben
Hauptverfasser:	WOO, JAE L, MEE, DAVID H, FARAH, BOSHRA D
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING NATURAL OR ARTIFICIAL THREADS OR FIBRES PHYSICS PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING SPINNING TESTING TEXTILES
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Beschreibung
Zusammenfassung:	A method of measuring the amount and type of foreign matter in a fibre assembly by scanning the assembly with a video camera and allocating a brightness or colour value to each pixel of the scan. The scanning preferably occurs with transmitted light. The number of pieces of foreign matter being detected by allocating a count to each group of adjacent pixels in excess of a predetermined value or a colour corresponding to a predetermined colour. The type of foreign matter being determined by scanning the image of each item of detected foreign matter and calculating a shape factor relative to each item then comparing each shape factor with predetermined shape factors calculated for known types of foreign matter.