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Automatisk detektering av diken i LiDAR-data
Linköping University, Department of Electrical Engineering, Computer Vision.
2011 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Automatic detection of ditches in LiDAR collected data (English)
Abstract [sv]

Den här rapporten har utrett möjligheten att automatiskt identifiera diken frånflygburet insamlat LiDAR-data. Den metod för identifiering som har valts harförst skapat en höjdbild från LiDAR-data. Därefter har den tagit fram kandidatertill diken genom att vektorisera resultatet från en linjedetektering. Egenskaper-na för dikeskandidaterna har sedan beräknats genom en analys av höjdprofilerför varje enskild kandidat, där höjdprofilerna skapats utifrån ursprungliga data.Genom att filtrera kandidaterna efter deras egenskaper kan dikeskartor med an-vändarspecificerade mått på diken presenteras i ett vektorformat som underlättarvidare användning. Rapporten beskriver hur algoritmen har implementerats ochpresenterar också exempel på resultat. Efter en analys av algoritmen samt förslagpå förbättringar presenteras den viktigaste behållningen av rapporten; Att det ärmöjligt med automatisk detektering av diken.

Abstract [en]

This Master’s thesis is investigating the possibility of automatically identifyingditches in airborne collected LiDAR data. The chosen approach to identificationcommences by creating an elevation picture from the LiDAR data. Then it usesthe result of a line detection to exhibit candidates for ditches. The properties forthe various candidates are calculated through an analysis of the elevation profile forthe candidates, where the elevation profiles are created from the original data. Byfiltering the candidates according to their calculated properties, maps with ditchesconforming to user-specified limits are created and presented in vector format.This thesis describes how the algorithm is implemented and gives examples ofresults. After an analysis of the algorithm and a proposal for improvements, itis suggested that automatic detection of ditches in LiDAR collected data is anachievable objective.

Place, publisher, year, edition, pages
2011. , 40 p.
Keyword [en]
linear feature extraction, line detection, LiDAR, ditches
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:liu:diva-72066ISRN: LiTH-ISY-EX--11/4524--SEOAI: oai:DiVA.org:liu-72066DiVA: diva2:456702
Subject / course
Computer Vision Laboratory
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-11-22 Created: 2011-11-15 Last updated: 2011-11-22Bibliographically approved

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