  Automatic open-domain dialogue evaluation is a crucial component of dialogue
systems. Recently, learning-based evaluation metrics have achieved
state-of-the-art performance in open-domain dialogue evaluation. However, these
metrics, which only focus on a few qualities, are hard to evaluate dialogue
comprehensively. Furthermore, these metrics lack an effective score composition
approach for diverse evaluation qualities. To address the above problems, we
propose a Multi-Metric Evaluation based on Correlation Re-Scaling (MME-CRS) for
evaluating open-domain dialogue. Firstly, we build an evaluation metric
composed of 5 groups of parallel sub-metrics called Multi-Metric Evaluation
(MME) to evaluate the quality of dialogue comprehensively. Furthermore, we
propose a novel score composition method called Correlation Re-Scaling (CRS) to
model the relationship between sub-metrics and diverse qualities. Our approach
MME-CRS ranks first on the final test data of DSTC10 track5 subtask1 Automatic
Open-domain Dialogue Evaluation Challenge with a large margin, which proved the
effectiveness of our proposed approach.
