Deep Learning, Artificial Intelligence, Convolutional Network, Object Detection, Data Science.
bg_lo threshold. And OHEM does not need a fg-bg ratio for data balancing. If any class were neglected, its loss would increase. There can be images where the fg RoIs are easy (e.g. canonical view of a car), so the network is free to use only bg regions in a mini-batch; and vice versa when bg is