Open-sourcing RightWayUp - a 360-degree image rotation model, and a JPEG shortcut we found in a common benchmark [P]

I work at ORTUS AI (we develop video analytics). We needed to tell from a single CCTV frame whether a camera had been rotated or installed at an angle (or upside-down), so we tried different models for that, without much luck (low accuracy, lots of false positives on regular camera-like frames).