Patent ID: 8699751
Filing Date: 2014-04-15
Classification: B33Y,G06T

Abstract:
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, MD, a cross-machine direction, CD, 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 for said effective height from said position of said pixel determined in step e) generally parallel to said Z-direction to said Z-direction baseline.