Automatic Grading of Sawlogs: A Comparison between X-ray Scanning, Optical Three-dimensional Scanning and Combinations of Both Methods

Scandinavian Journal of Forest Research

Volumn 19, Issue 1, 2004, Pages 89-95

  Oja, Johan ^a,b   Grundberg, Stig ^a,b   Fredriksson, Johan ^b   Berg, Per ^b  

^a LULEÅ UNIVERSITY OF TECHNOLOGY   (Sweden)

^b Swed Inst for Wood Technol Res   (Sweden)

Author keywords

3D scanning; Automatic grading; Pinus sylvestris; PLS; Sawlogs; Sorting; X ray

Indexed keywords

SAWMILLS; SCANNING; X RAY ANALYSIS;

LOG GRADING; X-RAY SCANNING;

FORESTRY;

PINUS SYLVESTRIS;

EID: 1442314047     PISSN: 02827581     EISSN: None     Source Type: Journal    
DOI: 10.1080/02827580310019563     Document Type: Article

References (31)

1. Andersson, C. 1997. PLS-modeller för sortering av friskkvisttimmer. Master's Thesis 338CIV, Luleâ Univ. of Technology. ISSN 1402-1617. (In Swedish with English summary.)
2. Anon. 2002a. RemaControl, Västerås, Sweden. http:// www.remacontrol.se/
3. Anon. 2002b. AB Trätek, Stockholm, Sweden. http:// www.tratek.se/
4. Anon. 2002c. User Guide, SIMCA-P and SIMCA-P+ 10. Umetrics AB, Umeå, Sweden. http://www.umetrics.com/
5. Aratake, S., Arima, T., Sakoda, T. & Nakamura, Y. 1992. Estimation of modulus of rupture (MOR) and modulus of elasticity (MOE) of lumber using higher natural frequency of log in pile of logs. Mokuzai Gakkaishi 38: 995-1001. (In Japanese with English summary.)
6. Asplund, T. & Johansson, L. G. 1984. Feasibility study of X-ray computerized tomography in research and development for wood-mechanical industry and forestry. Wood Technology Report, STFI-meddelande A 904, Stockholm, 36 pp.
7. Benson-Cooper, D. M., Knowles, R. L., Thompson, F. J. & Cown, D. J. 1982. Computed tomographic scanning for the detection of defects within logs. Bull. No. 8, Forest Res. Inst., New Zealand Forest Serv., 9 pp.
8. Chang, S. J., Olson, J. R. & Wang, P. C. 1989. NMR imaging of internal features in wood. For. Prod. J. 39 (6): 43-49.
9. Dashner, B. 1993. 3D Log scanning-the next generation. Proceedings of the 5th Int. Conference on Scanning Technology and Process Control for the Wood Products Industry, Atlanta, 25-27 Oct. 1993.
10. Geladi, P. & Kowalski, B. R. 1986. Partial least-squares regression: a tutorial. Analyt. Chim. Acta 185: 1-17.
11. Grace, L. A. 1994. Design and evaluation of an optical scanner based log grading and sorting system for Scots pine (Pinus sylvestris L.) sawlogs, pp. 7-21. Dissertation, Swedish Univ. of Agric. Sci., Uppsala. ISBN 91-576-4848-4.
12. Grundberg, S. & Grönlund, A. 1997. Simulated grading of logs with an X-ray LogScanner-grading accuracy compared with manual grading. Scand. J. For. Res. 12: 70-76.
13. Grundberg, S. & Grönlund, A. 1998. Feature extraction with the aid of an X-ray LogScanner. In Grönlund, A., Hagman, O. & Lindgren, O. (eds). Proceedings of the 3rd International Wood Scanning Seminar, 17-19 Aug. 1998, Lövånger, Sweden. Technical Report 27, pp. 39-49, Luleå Univ. of Technology. ISSN 1402-1536.
14. Han, W. & Birkeland, R. 1992. Ultrasonic scanning of logs. Industrial Metrology 2: 253-281.
15. Jäppinen, A. 2000. Automatic sorting of sawlogs by grade. Silvestria 139. Doctoral Thesis, Swedish Univ. of Agric. Sci. ISBN 91-576-5873-0.
16. Kaestner, A. & Bååth, L. B. 1998. A polarimetry based scanning method for wood. In Grönlund, A., Hagman, O. & Lindgren, O. (eds). Proceedings of the 3rd International Wood Scanning Seminar, 17-19 Aug. 1998, Lövånger, Sweden. Technical Report 27, pp. 59-69, Luleå Univ. of technology. ISSN 1402-1536.
17. Lindgren, F. 1994. Third generation PLS Some elements and applications. Thesis, Umeå Univ., pp. 17-41. ISBN 91-7174-911-X.
18. Lindgren, L. O. 1991. Medical CAT-scanning: X-ray absorption coefficients, CT-numbers and their relation to wood density. Wood Sci. Technol. 25: 341-349.
19. Lundgren, C. & Jäppinen, A. 1998. Grading of logs using external geometry features from 3D-and shadow scanners-a comparison. In Grönlund, A., Hagman, O. & Lindgren, O. (eds). Proceedings of the 3rd International Wood Scanning Seminar, 17-19 Aug. 1998, Lövånger, Sweden. Technical Report 27, pp. 31-38, Luleå Univ. of Technology. ISSN 1402-1536.
20. Martens, H. & Naes, T. 1989a. In Multivariate Calibration, pp. 254-258. John Wiley & Sons, New York. ISBN 0-471-93047-4.
21. Martens, H. & Naes T. 1989b. In Multivariate Calibration, pp. 237-250. John Wiley & Sons, New York. ISBN 0-471-93047-4.
22. Oja, J., Broman, O. & Lindfors, S. E. 1999. Projektrapport: Timmerinmätningsstöd. Teknisk Rapport 15, Luleå Univ. of Technology. ISSN 1402-1536. (In Swedish with English summary.)
23. Oja, J., Wallbäcks, L., Grundberg, A., Hägerdal, E. & Grönlund, A. 2000. Automatic grading of saw logs using an industrial X-ray LogScanner. In Kline, E. & Abbott, A. L. (eds). Proceedings of the 4th International Conference on Image Processing and Scanning of Wood, Mountain Lake Resort, Mountain Lake, VA, 21-23 Aug. 2000, pp. 29-35. USDA Forest Service, Southern Research Station.
24. Oja, J., Grundberg, S. & Grönlund, A. 2001. Predicting the stiffness of sawn products by X-ray scanning of Norway spruce saw logs. Scand. J. For. Res. 16: 88-96.
25. Ross, R. J., McDonald, K. A., Green, D. W. & Schad, K. C. 1997. Relationship between log and lumber modulus of elasticity. For. Prod. J. 47 (2): 89-92.
26. Saint-André, L., Hervė, J-C. & Leban, J.-M. 2000. Modelling the number of rings in individual logs of Norway spruce. Scand. J. For. Res. 15: 135-143.
27. Sandoz, J. L. 1996. Ultrasonic solid wood evaluation in industrial applications. In Sandoz, J. L. (ed.). Proceedings of the 10th International Symposium on Nondestructive Testing of Wood, Lausanne, Switzerland, 26-28 Aug. 1996. Swiss Federal Institute of Technology. Chair of Timber Construction, pp. 147-153. ISBN 2-88074-325-7.
28. Sederholm, J. 1988. Sortering av timmer med genomlysningsteknik. Mätningar med mätsystemet Tina våren 1987. Trätekrapport P8812080. Trätek, Stockholm. ISSN 0283-4634. (In Swedish.)
29. Skatter, S. & Dyrseth, A. A. 1997. Vibration of logs measured by TV holography. Wood Fiber Sci. 29: 228-238.
30. Soest, J. F. 1996. Internal defect scanning using MRI in combination with automatic pattern recognition. In Proceedings of the 6th International Conference on Scanning Technology and Process Optimization for the Wood Products Industry, Vancouver, BC, 31 Oct.-1 Nov. 1996, pp. 85-92.
31. Taylor, F. W., Wagner, F. G., Jr, McMillin, C. W., Morgan, I. L. & Hopkins, F. F. 1984. Locating knots by industrial tomography - a feasibility study. For. Prod. J. 34: 42-46.