http://noi.openjudge.cn/ch0303/3340/ 描述 Reverse Polish notation (or just RPN) by analogy with the related Polish notation, a prefix notation introduced in 1920 by the Polish mathematician Jan Łukasi
【对RPN的学习记录】 定义: Region Proposal的中文意思是“区域选取”,也就是“提取候选框”的意思,所以RPN就是用来提取候选框的网络。RPN第一次提出是在Faster R-CNN: Towards Real-Time Object Detection with Region Proposal Networks论文中,用于目标检测。它是一个完全卷积的网络,它可以同时预测每个位置