2021

PnPOOD : Out-Of-Distribution Detection for Text Classification via Plug andPlay Data Augmentation

Rawat, Mrinal, Hebbalaguppe, Ramya, Vig, Lovekesh

Understand

While Out-of-distribution (OOD) detection has been well explored in computer vision, there have been relatively few prior attempts in OOD detection for NLP classification.

  • In this paper we argue that these prior attempts do not fully address the OOD problem and may suffer from data leakage and poor calibration of the resulting models.
  • We present PnPOOD, a data augmentation technique to perform OOD detection via out-of-domain sample generation using the recently proposed Plug and Play Language Model (Dathathri et al., 2020).
  • Our method generates high quality discriminative samples close to the class boundaries, resulting in accurate OOD detection at test time.

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