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ASPP

A pytorch implementation of ASPP modul.

空洞空间卷积池化金字塔(atrous spatial pyramid pooling (ASPP))对所给定的输入以不同采样率的空洞卷积并行采样,相当于以多个比例捕捉图像的上下文。

每一个空洞卷积都会获得更大的感受野,对于大尺寸目标的检测效果比较友好。

ASPP可以获取不同尺度特征的空间信息,可以理解为多尺度的上下文信息。

在知乎上有个人回答的感觉挺好,上下文信息大概可以理解为:每一个像素不是孤立的,好多个像素组合在一起才能看得出要表达的画面,所以像素和像素之间是具有一定的关系,大量的像素以及他们之间的关系可以理解为上下文信息,也可以理解为感受野。

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