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This paper considers a new method for building-extraction from LiDAR data. This method uses multi-scale levelling schema orMSLS-segmentation based on differential morphological profiles for removing non-building points from LiDAR data during the datadenoising step. A new morphological algorithm is proposed for the detection of flat regions and obtaining a set of building-candidates.This binarisation step is made by using differential attribute profiles based on the sum of the second-order morphological gradients. Anydistinction between flat and rough surfaces is achieved by area-opening, as applied within each attribute-zone. Thus, the detection ofthe flat regions is essentially based on the average gradient contained within a region, whilst avoiding subtractive filtering rule. Finally,the shapes of the flat-regions are considered during the building-recognition step. A binary shape-compactness attribute opening isused for this purpose. The efficiency of the proposed method was demonstrated on three test LiDAR datasets containing buildingsof different sizes, shapes, and structures. As shown by the experiments, the average quality of the buildings-extraction was more than95 %, with 96 % correctness, and 98 % completeness. In terms of quality, this method is comparable with TerraScan&#0174;, but both methodssignificantly differ when comparing correctness and completeness of the results

DETECTION OF PLANAR POINTS FOR BUILDING EXTRACTION FROM LIDAR DATA BASED ON DIFFERENTIAL MORPHOLOGICAL AND ATTRIBUTE PROFILES