Method and apparatus for measuring fiber orientation of a moving web

作者: John F. Shakespeare , Markku M. Kellomaki

DOI:

关键词: Digital imageOperator (computer programming)Distribution (mathematics)Integer (computer science)Orientation (computer vision)MathematicsImage (mathematics)OpticsFiber orientation

摘要: An image-based measurement technique that directly measures the orientation of fibers in a moving web comprises nonwoven material angles individual so more robust estimate statistical distribution is obtained. The includes steps of: (a) illuminating an area on at least one side with radiation; (b) obtaining digital image illuminated area; and (c) calculating fiber by processing gradient operator thereby analyzing observed within image. preferably non-integer order between ⅓ ⅔ particularly ¼ ¾. use fractional-gradient operators yields reliable results than when integer gradients are employed.