So there's this way of classifying an object as NotA (none of the above) class as described in https://arxiv.org/abs/1910.02830 So mostly this uses a sort of confidence thresholding with different approaches.
Can a classifier with such a NotA class be used as part of an object detection framework?
I'm assuming if the classifier isn't trained on a background class then NotA would "light up" also on background, so that class might need to be added as well to make some sense.