Apparatus and method for measuring caliper of creped tissue paper based on a dominant frequency of the paper and a standard deviation of diffusely reflected light including identifying a caliper measurement by using the image of the paper
First Claim
1. A method comprising:
- using at least one processing device;
obtaining an image of a web of creped tissue paper; and
identifying a caliper measurement of the web using the image, the caliper measurement based on a dominant frequency of the web and a standard deviation of diffusely-reflected light from the web.
1 Assignment
0 Petitions
Accused Products
Abstract
A method includes, using at least one processing device, obtaining an image of a web of creped tissue paper and identifying a caliper measurement of the web using the image. The caliper measurement is based on a dominant frequency of the web and a standard deviation of diffusely-reflected light from the web. The dominant frequency of the web can be based on a number of crepe folds having a dominant crepe fold size that fit within a specified unit distance of the web in the image. The dominant crepe fold size can be determined using a discrete auto-covariance function of the image or a second image of the web. The standard deviation can be based on a variation of reflected light from larger crepe structures in the web.
20 Citations
20 Claims
-
1. A method comprising:
using at least one processing device; obtaining an image of a web of creped tissue paper; and identifying a caliper measurement of the web using the image, the caliper measurement based on a dominant frequency of the web and a standard deviation of diffusely-reflected light from the web. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
10. An apparatus comprising:
-
at least one memory configured to store an image of a web of creped tissue paper; and at least one processing device configured to identify a caliper measurement of the web using the image based on a dominant frequency of the web and a standard deviation of diffusely-reflected light from the web. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A non-transitory computer readable medium embodying a computer program, the computer program comprising computer readable program code for:
-
obtaining an image of a web of creped tissue paper; and identifying a caliper measurement of the web using the image based on a dominant frequency of the web and a standard deviation of diffusely-reflected light from the web. - View Dependent Claims (18, 19, 20)
-
Specification