Most of us have seen slowly-moving dark bands or thin lines when shooting video with large LED displays in the frame. The LED screen could be the focus of the shot or just in the background, but either way, these unwanted artifacts detract from the visual experience and vary in size, number, intensity, and movement depending on multiple factors.
Most of these artifacts are caused by the type of imagers used in the cameras. Modern video and still cameras use CMOS sensors to capture images, and most have been “rolling shutter” CMOS imagers. In this article, we will discuss the advantages of the latest development in CMOS sensors – “global shutter” – and how global shutter imagers can greatly reduce or eliminate LED display artifacts.