Automated inspection of carpets

Jian Wang; Rosemary A. Campbell; Ray J. Harwood

doi:10.1117/12.198873

6 January 1995 Automated inspection of carpets

Jian Wang, Rosemary A. Campbell, Ray J. Harwood

Proceedings Volume 2345, Optics in Agriculture, Forestry, and Biological Processing; (1995) https://doi.org/10.1117/12.198873
Event: Photonics for Industrial Applications, 1994, Boston, MA, United States

Abstract

A unified method for detecting all types of textural faults on a carpet using machine vision is presented. The Gaussian Markov Random Field (GMRF) model is used for the modelling of the textural surface of carpet. An experimental device using a line-scan camera and an IBM personal computer has been set up simulating on-line inspection of woven carpets to detect various types of fault arising in the production process. Measures for detecting faults are derived from the GMRF model based on sufficient statistics. This measure is very effective in detecting textural differences. Detection of unlevel, linear and other types of faults is discussed. In combination with our previous linear faults detection method, we have the confidence to be able to detect all types of textural faults on a plain carpet in an efficient way. With some additional techniques, this method can also be used for the detection of faults in colored pattern carpets.

Citation Download Citation

Jian Wang, Rosemary A. Campbell, and Ray J. Harwood "Automated inspection of carpets", Proc. SPIE 2345, Optics in Agriculture, Forestry, and Biological Processing, (6 January 1995); https://doi.org/10.1117/12.198873

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available