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Wood defect detection using image analysis on laser scatter data
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2010 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesisAlternative title
Defektdetektering i trä genom bildanalys av laserspridningsdata (Swedish)
Abstract [en]

The wood industry constantly demands more and more from their suppliers. As long as there is more money to make the saw mills will be interested in new technology achieving this. To spot defects in an early stage of the saw line and affect the end result is something that is highly wanted from the market.

This thesis examines the possibility to develop an add-on to an existing construction. This add-on would then detect knots on the block in an early stage with the help of scatter data. A demo application was developed to present the result. The application returns the original image with measured defects and has 95% accuracy.

Abstract [sv]

Skogsindustrin världen över kräver i dagens läge mer och mer av sina leverantörer. Så länge det finns mer pengar att tjäna kommer sågverken att vara intresserade av ny teknik som hjälper dem. Att se defekter i tidigt skede och kunna påverka resultatet i slutet av såglinjen är något som eftertraktas av marknaden.

Denna rapport undersöker möjligheten att utveckla ett idag driftsatt system med ytterligare en funktion. Detta i form av att kunna detektera kvistar på träblocket i ett tidigt skede med hjälp av en scatteravläsning. En demoapplikation utvecklades för att kunna presentera och redovisa resultatet. Applikationen returnerar den inlästa bild med uppmätta defekter med 95% träffsäkerhet.

Place, publisher, year, edition, pages
2010. , 47 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-93513ISRN: LiU-ITN-TEK-A--10/029--SEOAI: oai:DiVA.org:liu-93513DiVA: diva2:628575
Subject / course
Media Technology
Supervisors
Examiners
Available from: 2013-06-14 Created: 2013-06-04 Last updated: 2013-06-14Bibliographically approved

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fulltext(920 kB)201 downloads
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf