Visual text evokes an image in a person's mind, while non-visual text fails
to do so. A method to automatically detect visualness in text will unlock the
ability to augment text with relevant images, as neural text-to-image
generation and retrieval models operate on the implicit assumption that the
input text is visual in nature. We curate a dataset of 3,620 English sentences
and their visualness scores provided by multiple human annotators.
Additionally, we use documents that contain text and visual assets to create a
distantly supervised corpus of document text and associated images. We also
propose a fine-tuning strategy that adapts large vision-language models like
CLIP that assume a one-to-one correspondence between text and image to the task
of scoring text visualness from text input alone. Our strategy involves
modifying the model's contrastive learning objective to map text identified as
non-visual to a common NULL image while matching visual text to their
corresponding images in the document. We evaluate the proposed approach on its
ability to (i) classify visual and non-visual text accurately, and (ii) attend
over words that are identified as visual in psycholinguistic studies. Empirical
evaluation indicates that our approach performs better than several heuristics
and baseline models for the proposed task. Furthermore, to highlight the
importance of modeling the visualness of text, we conduct qualitative analyses
of text-to-image generation systems like DALL-E.

该论文提出了一种基于大型视觉语言模型 CLIP 的 fine-tuning 策略，用于从文本中评分文本的视觉性，并对其进行分类，得到了比其他方法更好的结果，并展示了文本视觉性对于文本生成任务的重要性。