--- tags: 生物辨識 --- # Searching Central Difference Convolutional Networks for Face Anti-Spoofing 本篇論文想解決 1. CNN經過多層網路描繪的是高階語意訊息,難以描述圖像的細部資訊,並且容易受到環境影響(光照) 2. 大多採取多帧输入,沒辦法部屬到實時性要求的環境中 ### Methodology #### Central Difference Convolution  一般的Convolution  Central Difference Convolution  將兩個結合後  公式如下   #### Neural Architecture Search 自己去學網路架構 在限定n個mode中去operation space挑  最後透過優化以下來決定架構和參數  #### Multiscale Attention Fusion Module  #### architecture 不是做binary classification 還是去predict 32 x32的深度圖或是mask  loss function   
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