https://www.sciencedaily.com/releases/2018/09/180919083329.htm > That's because traditional videos and photos for studying motion are two-dimensional, and don't show us the underlying 3-D structure of the person or subject of interest. Without the full geometry, we can't inspect the small and subtle movements that help us move faster, or make sense of the precision needed to perfect our athletic form. > Recently, though, researchers from MIT's Computer Science and Artificial Intelligence Laboratory (CSAIL) have come up with a way to get a better handle on this understanding of complex motion.