How Do You Rate This Publication?       

Title:	Enhancement of the Computer Lumber Grading Program to Support Polygonal Defects
Author(s):	Klinkhachorn, Powsiri; Kathari, R.; Yost, D.; Araman, Philip A.
Date:	1993
Source:	Forest Products Journal. 42(10): 41-46.
Description:	Computer grading of hardwood lumber promises to avoid regrading of the same lumber because of disagreements between the buyer and the seller. However, the first generation of computer programs for hardwood lumber grading simplify the process by modeling defects on the board as rectangles. This speeds up the grading process buy can inadvertently put a board into a lower grade because rectangular approximation can cause clear board surface area to be lost. This paper presents a polygonal computer lumber grading program that models the defects on the boards as polygons, thereby making the grade determination process more accurate. The grading program presented herein allows species-independent rules and considers both faces of the board in the grading process. The approximation of defects as polygons does result in an increased amount of processing time, which can be readily offset with the fast and inexpensive computers that are now available.
	View and Print this Publication (210 KB)
Publication Notes:	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. Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS Webmaster, srswebmaster@fs.fed.us if you notice any errors which make this publication unuseable.
	Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility