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arXiv 2210.02291cs.CV

渐进式文本到图像生成

Progressive Text-to-Image Generation

Meituan(美团)

Zhengcong Fei, Mingyuan Fan, Li Zhu, Junshi Huang

AI总结:

本文提出一种从粗到细并行生成图像标记并引入误差修正机制的渐进式文本到图像生成方法,在MS COCO上显著提升FID并实现超13倍推理加速。

摘要:

近年来,向量量化自回归(VQ-AR)模型在文本到图像合成中取得了显著成果,其方式是在潜在空间中从左上到右下等概率地预测离散图像标记。尽管这种简单的生成过程出人意料地有效,但这是生成图像的最佳方式吗?例如,人类的创作更倾向于从轮廓到细节逐步完成图像,而VQ-AR模型本身并不考虑图像块之间的任何相对重要性。本文提出了一种用于高保真文本到图像生成的渐进式模型。该方法基于现有上下文以并行方式从粗到细创建新的图像标记,并通过所提出的误差修正机制递归地应用这一过程,直到图像序列完成。由此产生的从粗到细的层次结构使图像生成过程直观且可解释。在MS COCO基准上的大量实验表明,与之前的VQ-AR方法相比,渐进式模型在FID分数上在广泛的类别和方面都取得了显著更好的结果。此外,每一步并行生成的设计允许超过13倍的推理加速,且性能损失很小。

英文摘要:

Recently, Vector Quantized AutoRegressive (VQ-AR) models have shown remarkable results in text-to-image synthesis by equally predicting discrete image tokens from the top left to bottom right in the latent space. Although the simple generative process surprisingly works well, is this the best way to generate the image? For instance, human creation is more inclined to the outline-to-fine of an image, while VQ-AR models themselves do not consider any relative importance of image patches. In this paper, we present a progressive model for high-fidelity text-to-image generation. The proposed method takes effect by creating new image tokens from coarse to fine based on the existing context in a parallel manner, and this procedure is recursively applied with the proposed error revision mechanism until an image sequence is completed. The resulting coarse-to-fine hierarchy makes the image generation process intuitive and interpretable. Extensive experiments in MS COCO benchmark demonstrate that the progressive model produces significantly better results compared with the previous VQ-AR method in FID score across a wide variety of categories and aspects. Moreover, the design of parallel generation in each step allows more than $\times 13$ inference acceleration with slight performance loss.

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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