“…When monitoring a wide-area facility such as a material handling conveyor in ironworks, not only installation and measurement time but also maintenance and management costs, such as sensor replacement, become large bottlenecks that make it difficult to improve their efficiency. To realize the measurement of dynamic structural properties using high spatial resolution images, many video analysis methods such as digital image correlation, 17,18) sampling moiré pattern method, 19,20) and optical flow 21,22) have been reported. They perform video analysis based on the frame rate of a commercially available video camera, which enables the simultaneous monitoring of multiple objects.…”