Does HBOS outlier detection requires normalization?

Hi,

Please does HBOS method for outlier detection requires normalization? Is it sensitive to scale like k-NN?

I read a paper that states that, "HBOS assumes independence of the features", so I tried deriving from it that HBOS might be done with allowing features to maintain their respective scales.

Please I would appreciate your kind support. Thank you.

Sincerely,

Jerwuney