You are here: Home
/ Publication Information
Title: Identifying and locating surface defects in wood: Part of an automated lumber processing system
Author: Conners, Richard W.; McMillin, Charles W.; Lin, Kingyao; Vasquez-Espinosa, Ramon E.;
Source: IEEE Transactions on Pattern Analysis and Machine Intelligence PAMI-5(6):573-583
Publication Series: Miscellaneous Publication
Description: Continued increases in the cost of materials and labor make it imperative for furniture manufacturers to control costs by improved yield and increased productivity. This paper describes an Automated Lumber Processing System (ALPS) that employs computer tomography, optical scanning technology, the calculation of an optimum cutting strategy, and 1 computer-driven laser cutting device. While certain major hardware components of ALPS are already commercially available, a major missing element is the automatic inspection system needed to locate and identify surface defects on boards. This paper reports research aimed at developing such an inspection system. The basic strategy is to divide the digital image of a board into a number of disjoint rectangular regions and classify each independently. This simple procedure has the advantage of allowing an obvious parallel processing implementation. The study shows that measures of tonal and pattern related qualities are needed. The tonal measures are the mean, variance, skewness, and kurtosis of the gray levels. The pattern related measures are those based on cooccurrence matrices. In this initial feasibillty study, these combined measures yielded an overall 88.3 percent correct classification on the eight defects most commonly found in lumber. To minimize the number of calculations needed to make the required classlfications a sequential classifier is proposed.
Keywords: Automatic inspection system, sequential classifier, texture analysis
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Conners, Richard W.; McMillin, Charles W.; Lin, Kingyao; Vasquez-Espinosa, Ramon E. 1983. Identifying and locating surface defects in wood: Part of an automated lumber processing system. IEEE Transactions on Pattern Analysis and Machine Intelligence PAMI-5(6):573-583
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility