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METHOD FOR QUANTIFYING THE EFFECTIVE HEIGHT OF FIBERS EMANATING FROM A SURFACE

  • US 20130230213A1
  • Filed: 03/02/2012
  • Published: 09/05/2013
  • Est. Priority Date: 03/02/2012
  • Status: Active Grant
First Claim
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1. A method for measuring the effective height of a fiber emanating from the surface of a web substrate, the web substrate having a machine direction, a cross-machine direction orthogonal and coplanar thereto, and a Z-direction orthogonal to both said machine and cross-machine directions, said method comprising the steps of:

  • a) providing an image file of said web substrate, said image file containing at least a two-dimensional image of said web substrate wherein at least one of said at least two-dimensions comprises at least a component of said Z-direction;

    b) establishing a Z-direction baseline having a length L and being generally co-planar to said Z-direction, said Z-direction baseline having a component orthogonal to said Z-direction;

    c) determining a pixel intensity of a first pixel disposed within said length, L;

    d) determining a pixel intensity for each pixel disposed in said Z-direction above said first pixel;

    e) determining a position of a pixel corresponding to a last change in intensity relative to said Z-direction baseline;

    f) measuring a minimum distance between said position of said pixel determined in step e) generally parallel to said Z-direction relative to said Z-direction baseline.

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