Funding for this research was provided by:
National Natural Science Foundation of China (41104009, 41774009, 41774005)
Hubei Provincial Natural Science Foundation of China (2016CFB443)
Open Foundation of the Key Laboratory of Precise Engineering and Industry Surveying, National Administration of Surveying, Mapping and Geoinformation of China (PF2015-14)
Open Foundation of Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, China Three Gorges University (2015KLA06)
Open Foundation of Hubei Key Laboratory of Construction and Management in Hydropower Engineering, China Three Gorges University (2014KSD13)
Article History
Received: 18 September 2017
Accepted: 29 January 2018
First Online: 12 February 2018