METHOD AND APPARATUS FOR CONSTRUCTING LARGE-SCALE URBAN POINT CLOUD DATASET AND EXTRACTING BUILDING INSTANCE

A method and an apparatus for constructing large-scale urban point cloud dataset and extracting building instance. The method includes obtaining a point cloud feature corresponding to a target point cloud; determining a foreground semantic map, an instance perception feature, and a center offset vector corresponding to the target point cloud based on the point cloud feature; selecting a plurality of building candidate points from building foreground points in the foreground semantic map, determining a relational matrix between the building foreground points and the building candidate points based on the instance perception feature and the center offset vector, determining an instance tag of each building foreground point based on the relational matrix, and merging the instance tag to obtain a result of a building candidate instance; and scoring the result of the building candidate instance, and determining a result of a building instance based on the scoring.