config.py paras problems

[chenzhm01]

preclude rois intersected with dontcare areas above the value

__C.TRAIN.DONTCARE_AREA_INTERSECTION_HI = 0.5
__C.TRAIN.PRECLUDE_HARD_SAMPLES = True

what is about it, what is dontcare area?

[Zardinality]

In my view, don't care area is an area where no label is provided but some objects of interests might occur, it is impossible to label them all because we have limited labor, but also inappropriate to label them as negative because it might have objects inside. So we choose to ignore such area while training.
If anyone has some other plausible ideas about it, be free to comment.