regarding config file - build.py

[PradKalkar]

build = dict(
    train=dict(
        max_per_img=dict(hum=-1, obj=-1),
        score_thr=dict(hum=0.1, obj=0.1),
        iou_thr=dict(pos=0.6, neg=0.4),
        max_h_as_o=-1,
        neg_pos_ub=50),
    test=dict(
        max_per_img=dict(hum=10, obj=20),
        score_thr=dict(hum=0.5, obj=0.1),
        iou_thr=dict(pos=0.5, neg=0.5),
        max_h_as_o=3))

Hi. In this snippet from configs/build.py, would you please explain why are different hyperparameter values used in train and test? (for eg. score thr for hum is 0.1 in train and 0.5 in test). What advantage is achieved by doing so?

Also, what does neg_pos_ub mean in train?

[yeliudev]

Using a lower threshold during training will provide more training samples. And neg_pos_ub means the number of negative samples assigned for one positive sample.