A study on the detection of bulging disease in ancient city walls based on fitted initial outer planes from 3D point cloud data

Heritage Science

Table 7 Comparison of the bulging results of different initial planes

	Actual bulging areas	Our method	RANSAC method	Historical record method
Maximum bulging value	18.8 cm	15.8 cm	11.4 cm	9.8 cm
Overall bulging area	101.89 m²	112.29 m²	41.42 m²	22.78 m²