カメラ同期制御装置を用いた近接写真測量による水面形状の計測

抄録

Water surface measurement by MLIT have played important roll in river management, though it is not intended to understand river morphology. Newly started hydrological observation system is installed in 1km interval, which may work very well to understand the flood waves. In order to understand water surface shape on bed forms, more precise measurements are necessary, whose time/special scales are short and small. The photogrammetry with plural camera is one of the key technologies to create 3-D geometry. Using a camera synchronization control device (SCD) as well as the SfM technology, it may be possible to measure the water surface in required scale and time. In this report, we measure the actual river using five sets of commercially available cameras and SCD, and success in precisely acquiring the water surface shape in the range of 25m × 50 m. It is also confirmed that the accuracy of the measurement is in the acceptable ranges comparing with fixed points on the ground and on the water surface.