The matching of point cloud and photographs

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Extracting data from point cloud

The preparation process of data obtained by laser scanning from the moment of surveying to the final product consists of several phases. After the initial phase of matching of the point cloud, it is possible to extract specified elements from the point cloud. After laser scanning, the resulting point cloud is matched and than feature extraction was carried out.  Pictures below show feature extraction of lanes. 

The matching of point cloud and photographs

The matching of point cloud and photographs is challenging because in the very point cloud, the noise and variation of the coordinate system occurs. In order for the process of matching the point cloud and photographs to take place, it is necessary to find the appropriate link between the point cloud and photographs, and in this way, each recorded photograph is linked to the corresponding location in the point cloud. Next pictures show a folded point cloud with photographs loaded in the TerraPhoto tool.