liu.seSearch for publications in DiVA
Change search
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
3D camera with built-in velocity measurement
Linköping University, Department of Electrical Engineering, Computer Vision. Linköping University, The Institute of Technology.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
3D-kamera med inbyggd hastighetsmätning (Swedish)
Abstract [en]

In today's industry 3D cameras are often used to inspect products. The camera produces both a 3D model and an intensity image by capturing a series of profiles of the object using laser triangulation. In many of these setups a physical encoder is attached to, for example, the conveyor belt that the product is travelling on. The encoder is used to get an accurate reading of the speed that the product has when it passes through the laser. Without this, the output image from the camera can be distorted due to a variation in velocity.

In this master thesis a method for integrating the functionality of this physical encoder into the software of the camera is proposed. The object is scanned together with a pattern, with the help of this pattern the object can be restored to its original proportions.

Abstract [sv]

I dagens industri används ofta 3D-kameror för att inspektera produkter. Kameran producerar en 3D-modell samt en intensitetsbild genom att sätta ihop en serie av profilbilder av objektet som erhålls genom lasertriangulering. I många av dessa uppställningar används en fysisk encoder som återspeglar hastigheten på till exempel transportbandet som produkten ligger på. Utan den här encodern kan bilden som kameran fångar bli förvrängd på grund av hastighetsvariationer.

I det här examensarbetet presenteras en metod för att integrera funktionaliteten av encodern in i kamerans mjukvara. För att göra detta krävs att ett mönster placeras längs med objektet som ska bli skannat. Mönstret återfinns i bilden fångad av kameran och med hjälp av detta mönster kan hastigheten bestämmas och objektets korrekta proportioner återställas.

Place, publisher, year, edition, pages
2011. , 103 p.
Keyword [en]
computer vision, motion estimation, optical flow, feature detection, corner detection, edge detection, velocity measurement, encoder-free, laser triangulation
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-68632ISRN: LiTH-ISY-EX--11/4523--SEOAI: oai:DiVA.org:liu-68632DiVA: diva2:455669
Subject / course
Computer Vision Laboratory
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-01-12 Created: 2011-05-24 Last updated: 2012-05-30Bibliographically approved

Open Access in DiVA

3D camera with built-in velocity measurement(16537 kB)230 downloads
File information
File name FULLTEXT01.pdfFile size 16537 kBChecksum SHA-512
c3e404897e539ec5b82027d84bc5be9481613e6947746ddb1044dee234d46f1703a0e387c3060664bb5566ad303b8078157dd9b38c2fd0b218cddc90d053f6fc
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Josefsson, Mattias
By organisation
Computer VisionThe Institute of Technology
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 230 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 355 hits
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