1. Image level memory bank / Normal feature Set, no downsampling

   

   1. pre-trained Resnet on ImageNet for classification.

   2. fi = F (xi)

      1. GAP: global average pooling

   3. anomaly score by average distance to k neighbors.

      

   4. this is [3] DN2.

2. pixel level memory bank: no downsampling

   

References

1. Spade: Sub-Image Anomaly Detection with Deep Pyramid Correspondences, 2020

   1. Deep Pyramid: feature pyramid

      

2. [3] DN2: deep nearest neighbor anomaly detection, 20