CREATION OF A DYNAMIC THREE-DIMENSIONAL MODEL BY “STRUCTURE FROM MOTION” FROM MULTIPLE FULL HD MOVIES OF A FULL-SCALE SHAKING TABLE TEST

On June 5, 2014, a full-scale shaking table test of Indonesian masonry houses was filmed using eight full high-definition (HD) movie cameras. From each of these eight cameras, 399 video frames (i.e., a total of 11,575 video frames per camera) were captured from the beginning of the shaking test to the collapse of the building at the 4th shaking test. This raw dataset was then processed by Structure from Motion (SfM) software to construct a three-dimensional model, with the behavior of the model observable in chronological order from arbitrary viewpoints. In our study, we found that the SfM processing results were affected by the quality and number of images used for processing, although we show that SfM is a powerful tool for observing the dynamic behavior of the entire surface of a model for shaking table tests.