DetailFlow: 1D Coarse-to-Fine Autoregressive Image Generation via Next-Detail Prediction

• URL: http://arxiv.org/abs/2505.21473v1
• Date: Tue, 27 May 2025 17:45:21 GMT
• Title: DetailFlow: 1D Coarse-to-Fine Autoregressive Image Generation via Next-Detail Prediction
• Authors: Yiheng Liu, Liao Qu, Huichao Zhang, Xu Wang, Yi Jiang, Yiming Gao, Hu Ye, Xian Li, Shuai Wang, Daniel K. Du, Shu Cheng, Zehuan Yuan, Xinglong Wu,
• Abstract summary: This paper presents DetailFlow, a coarse-to-fine 1D autoregressive (AR) image generation method.<n>By learning a resolution-aware token sequence supervised with progressively degraded images, DetailFlow enables the generation process to start from the global structure.<n>Our method achieves high-quality image synthesis with significantly fewer tokens than previous approaches.
• Score: 47.483590046908844
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper presents DetailFlow, a coarse-to-fine 1D autoregressive (AR) image generation method that models images through a novel next-detail prediction strategy. By learning a resolution-aware token sequence supervised with progressively degraded images, DetailFlow enables the generation process to start from the global structure and incrementally refine details. This coarse-to-fine 1D token sequence aligns well with the autoregressive inference mechanism, providing a more natural and efficient way for the AR model to generate complex visual content. Our compact 1D AR model achieves high-quality image synthesis with significantly fewer tokens than previous approaches, i.e. VAR/VQGAN. We further propose a parallel inference mechanism with self-correction that accelerates generation speed by approximately 8x while reducing accumulation sampling error inherent in teacher-forcing supervision. On the ImageNet 256x256 benchmark, our method achieves 2.96 gFID with 128 tokens, outperforming VAR (3.3 FID) and FlexVAR (3.05 FID), which both require 680 tokens in their AR models. Moreover, due to the significantly reduced token count and parallel inference mechanism, our method runs nearly 2x faster inference speed compared to VAR and FlexVAR. Extensive experimental results demonstrate DetailFlow's superior generation quality and efficiency compared to existing state-of-the-art methods.

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