Is my case a unsupervised or semi-supervised learning?


#1

Hello everybody,

I am ambiguous about a learning problem.
I am working on a task of anomaly detection. I train a model of only normality patterns, then classify a new sample by its likelihood (or similar quantities). I determine several hyperparameters (e.g. number of training epochs) by cross-validation, in which each evaluation set contains samples of normality and abnormality.

So I want to know your idea about this learning.

Thank you!


(Ritesh) #2

Hi… I am working on anomaly detection problem too, with similar algo as you have mentioned. In my opinion this category belongs to One Class classification. Hence I feel it’s semi-supervised, because algo is not forced to find the structure in the data, rather we are providing half of the classes.