SSD阅读笔记

论文下载地址：https://arxiv.org/abs/1512.02325
论文代码：https://github.com/weiliu89/caffe/tree/ssd

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The Single Shot Detector (SSD)

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创新点：

在5个feature map 上同时预测。

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SSD结构

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损失函数

N is the number of matched default boxes.

The confidence loss is the softmax loss over multiple classes confidences (c)

the weight term α is set to 1 by cross validation