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arXiv 2411.02437cs.CVcs.AI
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TypeScore:文本到图像生成模型的文本保真度度量

TypeScore: A Text Fidelity Metric for Text-to-Image Generative Models

Georgia Gabriela Sampaio, Ruixiang Zhang, Shuangfei Zhai, Jiatao Gu, Josh Susskind, Navdeep Jaitly, Yizhe Zhang

AI总结:

提出TypeScore,一种基于文本渲染保真度的新度量,用于灵敏评估文本到图像生成模型的指令遵循能力,并通过集成不相似度度量实现比CLIPScore更高的区分度。

摘要:

尽管文本到图像生成模型的整体性能取得了显著进步,对其评估仍然是一个挑战。现有的度量方法如CLIPScore适用于粗略评估,但随着模型性能的快速提升,它们缺乏区分更细微差异的灵敏度。在本工作中,我们聚焦于这些模型的文本渲染方面,这为评估生成模型的细粒度指令遵循能力提供了一个视角。为此,我们引入了一个名为TypeScore的新评估框架,用以灵敏地评估模型遵循精确指令生成具有高保真嵌入文本图像的能力。我们认为,这种文本生成能力可作为图像合成中一般指令遵循能力的代理指标。TypeScore使用一个额外的图像描述模型,并利用原始文本与提取文本之间的集成不相似度度量来评估渲染文本的保真度。我们提出的度量在区分流行图像生成模型方面展现出比CLIPScore更高的分辨率,涵盖了一系列具有多样文本风格的指令。我们的研究还评估了这些视觉语言模型(VLMs)遵循风格化指令的程度,将风格评估与嵌入文本保真度分离。通过人工评估研究,我们定量地元评估了该度量的有效性。我们进行了全面分析,以探讨文本长度、字幕模型以及该任务上当前向人类水平趋近的进展等因素。该框架为图像生成中嵌入文本的指令遵循方面存在的剩余差距提供了见解。

英文摘要:

Evaluating text-to-image generative models remains a challenge, despite the remarkable progress being made in their overall performances. While existing metrics like CLIPScore work for coarse evaluations, they lack the sensitivity to distinguish finer differences as model performance rapidly improves. In this work, we focus on the text rendering aspect of these models, which provides a lens for evaluating a generative model's fine-grained instruction-following capabilities. To this end, we introduce a new evaluation framework called TypeScore to sensitively assess a model's ability to generate images with high-fidelity embedded text by following precise instructions. We argue that this text generation capability serves as a proxy for general instruction-following ability in image synthesis. TypeScore uses an additional image description model and leverages an ensemble dissimilarity measure between the original and extracted text to evaluate the fidelity of the rendered text. Our proposed metric demonstrates greater resolution than CLIPScore to differentiate popular image generation models across a range of instructions with diverse text styles. Our study also evaluates how well these vision-language models (VLMs) adhere to stylistic instructions, disentangling style evaluation from embedded-text fidelity. Through human evaluation studies, we quantitatively meta-evaluate the effectiveness of the metric. Comprehensive analysis is conducted to explore factors such as text length, captioning models, and current progress towards human parity on this task. The framework provides insights into remaining gaps in instruction-following for image generation with embedded text.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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