Using deep learning to digitize road arrow markings from lidar points cloud derived images

M. L.R. Lagahit, Y. H. Tseng

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The concept of Autonomous vehicles or self-driving cars has recently been gaining a lot of popularity. Because of this, a lot of research is being done to develop the technology. One of which is High Definition (HD) Maps, which are centimeter-level precision 3D maps that contain a lot of geometric and semantic information about the road which can assist the AV when driving. An important component of HD maps is the road markings which indicates a set of rules on how a vehicle should navigate itself on the road. For example, lane lines indicate which part of the road a vehicle can drive on in a certain direction. This research proposes a methodology that uses deep learning techniques to detect road arrows, road markings that show possible driving directions, on LIDAR derived images, and extract them as polyline vector shapefiles. The general workflow consists of (1) converting the LIDAR point cloud to images, (2) training and applying U-Net-a fully convolutional neural network, (3) creating masks from image segmentation results that have been transformed to fit the local coordinates, (4) extracting the polygons and polylines, and finally (5) exporting the vectors in shapefile format. The proposed methodology has shown promising results with object segmentation accuracies comparable with previous related works.

Original languageEnglish
Pages (from-to)123-129
Number of pages7
JournalInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
Issue numberB5
Publication statusPublished - 2020 Aug 6
Event2020 24th ISPRS Congress - Technical Commission V (TC-V) on Education and Outreach - Youth Forum - Nice, Virtual, France
Duration: 2020 Aug 312020 Sept 2

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Geography, Planning and Development


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