Length-Controllable Image Captioning
Table 4: Diversity analysis. BS denotes beam search with a beam size of 4.
['Models', 'AoANet BS', 'AoANet 4-Level', 'VLP BS', 'VLP 4-Level', 'LaBERT 4-Level']
We also perform diversity analysis for the image captions generated by different models, as shown in Fig. From Fig. On the contrary, the results of the original AoANet, VLP and the single-level LaBERT distribute mainly in the shortest two levels. Interestingly, our non-autoregressive model LaBERT significantly outperforms all compared autoregressive methods on all three diversity metrics.