A Powerline-Tuned Camera Trigger for AC Illumination Flickering Reduction

Camera triggering represents an essential step for synchronizing artificial vision systems (AVSs) and can affect the quality of acquired images. In fact, a proper trigger signal is mandatory to synchronize in time both stand alone or multiple cameras covering large environments. In addition, indoor environments with artificial light sources can induce flickering noise in captured frames, affecting the performance of the algorithms that are usually executed to interpret a scene or perform various tasks. In this letter, we describe the design of an embedded system for camera triggering that can be employed to deal with such issues and remove flickering noise while capturing an image with the highest possible dynamic range. Experiments on real data show how the proposed trigger can be effectively employed in AVSs.