发明名称 |
METHOD AND APPARATUS FOR MEASURING FIBER ORIENTATION OF A MOVING WEB |
摘要 |
An image-based measurement technique that directly measures the orientation of fibers in a moving web that comprises nonwoven material measures the orientation angles of the individual fibers so that a more robust estimate of the statistical distribution of fibers is obtained. The technique includes the steps of: (a) illuminating an area on at least one side of the web with radiation; (b) obtaining at least one digital image of the illuminated area; and (c) calculating the fiber orientation of the web by processing the at least one digital image with a gradient operator thereby analyzing the distribution of observed fiber orientation angles within the image. The gradient operator is preferably of a non-integer order between ⅓ and ⅔ and particularly between ¼ and ¾. The use of fractional-gradient operators yields more reliable results than when integer order gradients are employed. |
申请公布号 |
CA2605557(A1) |
申请公布日期 |
2006.11.02 |
申请号 |
CA20062605557 |
申请日期 |
2006.01.12 |
申请人 |
HONEYWELL INTERNATIONAL INC. |
发明人 |
KELLOMAKI, MARKKU M.;SHAKESPEARE, JOHN F. |
分类号 |
G06T7/00;G01N21/89 |
主分类号 |
G06T7/00 |
代理机构 |
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