# Feature Dictionary vs. PatchCore

###### tags: `paper` `working`

| | Feature Dictionary [^1] | PatchCore [^2] |
| -------------------- | ---------------------------------- | ----------------------------------- |
| dataset | Scanning Electron Microscope | MVTec AD |
| patch size | | |
| backbone | ResNet18 | WideResNet50 |
| feature vector size | level 5 | level 2 + 3 |
| post-feature mixing | (No further action) | avgpool(size=3) + upsample + concat |
| | PCA | Random Linear Projection |
| clustering | k-means | coreset selection |
| anomaly score | averaging distances of $m$ nearest | distance to the nearest |

[^1]: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5795842/pdf/sensors-18-00209.pdf
[^2]: http://arxiv.org/abs/2106.08265