What Makes A Good Story? Designing Composite Rewards for Visual Storytelling
Table 3: Comparison between different models on three rewards, i.e., Relevance, Coherence and Expressiveness.
['Method', 'Relevance', 'Coherence', 'Expressiveness']
In addition to the automatic metrics, we can also use the designed reward functions to score each story generated by different methods. To evaluate the overall performance of one method at the corpus level, we average the reward scores of all stories generated by the method on the test set. Our proposed ReCo-RL method outperforms all the start-of-the-art methods and our variants (BLEU-RL, MLE) on all three quality aspects.