image-super-resolution
RCAN
(ECCV2018)
网络结构分析:
总体结构:浅层特征提取+RIR深层特征提取+ 上采样+重建
① 浅层特征提取:conv×1
② RIR:三层Res block
大Res block: 多个RG+ long skip connection
小Res block(RG): 多个RCAB+ short skip connection
RCAB: 多个conv+ Channel attention + skip connection
Channel attention
feature map经过GAP,然后1×1 Conv按缩减比r 进行通道缩减降维,经过ReLu后再通道上采样至原先通道数,然后Sigmoid输出,得到一个类似attention的map,和原先的feature map相乘得到输出通道方向加权的feature map
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