Automatic mapping of signs : using Ladybug images and computer vision : part of R&D project «Infrastruktur i 3D» in cooperation between Innvasjon Norge, Trafikverket and TerraTec
Series: Trafikverket. Publikation ; 2018:066Publication details: Borlänge : Trafikverket, 2018Description: 12 sOther title:- Automated mapping of signs
The scope of this project was to investigate whether images from TerraTec’s mobile mapping system can be used for mapping purposes. Traditionally, the point cloud is used for mapping of objects and images are used for varying visualization purposes. Although the position of signs can be accurately found in the point cloud, it is often difficult to identify the type of sign, as many of them are quite similar in shape and size. In images, however, the signs are usually easy for the human eye to identify. Automatic mapping of signs is done by automated recognition and georeferencing of signs in panoramic images. Image recognition makes it possible to automatically identify and classify signs in images. The image can be georeferenced by position and orientation of the mobile mapping system, which makes it possible to georeference the sign by image geometry or information from the point cloud.