Monitoring Dynamic Deformation of Building Using Unmanned Aerial Vehicle

Table 1

Comparative analysis with related work.

Characteristics	Yufeng Weng et al. [24]	Yongquan Ge et al. [25]	This study
Measurement	UAV	Camera	UAV
	DJI Phantom 3 Pro	Sony	DJI Phantom 4 Pro
Monitored structure	Elevator tower	Steel structure building	Steel structure building
Method	Homography	Z-MP method	Improved Z-MP
Advantage	Absolute displacement	High monitoring frequency	High monitoring frequency
Limitation	(i) The accuracy depends on the feature tracking accuracy and the performance of the FNN	(i) Camera position	(i) Stability of UAV
	(ii) Illumination changes	(ii) Absolute displacement	(ii) Absolute displacement
	(iii) Large movements in multidirections
	(iv) Number of image coordinates
	(v) Complexity