Most current FR systems are required to operate through existing camera networks - organizations do not want to replace their existing cameras networks for the

Most current FR systems are required to operate through existing camera networks - organizations do not want to replace their existing cameras networks for the addition of FR. Those cameras have issues with illumination dynamic range - meaning an easy mitigation is to wear one of those baseball caps with blinky leds on them, as well as some eyeglass frames have (fashion) leds on them as well. Those small lights cause the camera to adjust for the brightness of the leds, causing the face to have reduced dynamic range - enough of a reduction to make FR on faces captured in this situation to be highly unreliable, if a face can be recovered at all.