Computer Vision-based Full-field Vibration Measurement of Large-scale Structures

Full-field displacement measurement is essential in evaluating the structural performance of long-span bridges and high-rise buildings. This study develops a novel, cost-efficient, and high-resolution dynamic displacement monitoring method using one digital camera. The complex real environment and full-field motion are overcome by the developed phase-based optical flow algorithm. The technique is applied to a long-span bridge and a high-rise building. One camera was set at a far distance of over 600 m away to measure the full-field motion of the entire structure. Moreover, a Convolutional Bokeh tracking method is developed to measure the vibration of structures in the evening under low-light conditions.