Patent ID: 8958898
Filing Date: 2015-02-17
Classification: G01B,G01N,G06T

Abstract:
1. A method of measuring the geometric characteristics of a crepe structure on a paper sheet, the method comprising the steps of: generating data values representing characteristics of positions on a paper sheet by repeatedly emitting at least two emission beams against each of the positions on the paper sheet and reflecting the two beams off of the positions and into a sensor constructed and arranged to absorb and measure the intensity of the reflected emission beams, correcting the measured intensity of the data values by using an n performing a row-by-row smoothing operation of the corrected data values using a filter algorithm, identifying positive to negative transitions within the smoothed data values, and correlating the identified positive to negative transitions with previously identified values known to correspond to particular geometric dimensions to determine geometric features of the crepe structure said determined geometric features comprising the beginning and ending of a of a crepe feature.