2021

On the Evaluation of Vision-and-Language Navigation Instructions

Zhao, Ming, Anderson, Peter, Jain, Vihan et al.

Understand

Vision-and-Language Navigation wayfinding agents can be enhanced by exploiting automatically generated navigation instructions.

  • However, existing instruction generators have not been comprehensively evaluated, and the automatic evaluation metrics used to develop them have not been validated.
  • Using human wayfinders, we show that these generators perform on par with or only slightly better than a template-based generator and far worse than human instructors.
  • Furthermore, we discover that BLEU, ROUGE, METEOR and CIDEr are ineffective for evaluating grounded navigation instructions.

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