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做不了细分类的原因是,训练阶段的mini-batch是只获取IoU0.5以上的框,目的就是对已知instance建模。因此整个模型就没有考虑到unknown instance。只是在test的时候,或者说,相当于后处理方法,给目标一个分数来判断是否是已知或者未知,这也是为什么文中会说:“Furthermore, since background proposals usually overwhelm the mini-batch, we sample the same number of foreground and background proposals, enabling our model to recall unknown objects from the background class.”
说一下我的理解和问题:
希望得到回复!谢谢
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