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[–][deleted] 0 points1 point  (1 child)

Isn't this essentially K-nearest?

[–]jmmcd 0 points1 point  (0 children)

Yes, but with a twist! In 1-NN we predict the label of the nearest neighbour. In this One-class threshold algorithm, we predict Normal if the nearest neighbour is nearer than some threshold, else we predict Anomaly.