Cross-Modal Coherence-Enhanced Feedback Prompting for News Captioning

摘要

News Captioning involves generating the descriptions for news images based on the detailed content of related news articles. Given that these articles often contain extensive information not directly related to the image, captions may end up misaligned with the visual content. To mitigate this issue, we propose the novel cross-modal coherence-enhanced feedback prompting method to clarify the crucial elements that align closely with the visual content for news captioning. Specifically, we first adapt CLIP to develop a news-specific image-text matching module, enriched with insights from language model MPNet using a matching-score comparative loss, which facilitates effective cross-modal knowledge distillation. This module enhance the coherence between images and each news sentences via rating confidence. Then, we design confidence-aware prompts to fine-tune LLaVA model with by LoRa strategy, focusing on essential details in extensive articles. Lastly, we evaluate the generated news caption with refined CLIP, constructing confidence-feedback prompts to further enhance LLaVA through feedback learning, which iteratively refine captions to improve its accuracy. Extensive experiments conduct on two public datasets, GoodNews and NYTimes800k, have validated the effectiveness of our method.