文章目录 特征金字塔 top-down pyramids featrue FPN网络结构 Bottom-up Top-down pathway and lateral connections 与目标检测网络的集成 与RPN的集成(Faster RCNN) 与Fast RCNN集成 对比实验 RPN集成结果 How important is top-down enrichment How important are lateral connections How important are pyramid representations