Author

Jin-Hua Zhang

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Preprint Sep 2026

Advanced Pixel Diffusion Model with Guided Sparse Global Refinement

Pixel-space diffusion has recently emerged as a promising direction for high-fidelity image generation by modeling images directly in the original pixel domain. However, pixel-space diffusion is computationally demanding due to the extremely high dimensionality of natural images. For efficiency, existing pixel diffusio...

Weiyi You, Jin-Hua Zhang, Xing-Yu Zhou et al. · 0 citations

Preprint Aug 2026

Beyond Token-Level Cross-Entropy: Fr\'echet Distributional Post-Training for Autoregressive Image Generation

Autoregressive image generators are commonly pretrained with token-level cross-entropy under teacher forcing, yet evaluated by the distributional quality of decoded images. This creates an objective mismatch, because categorical errors have unequal image-level consequences, and a context mismatch, because inference con...

Jin-Hua Zhang, Yist Y. Lin, Wei Long et al. · 0 citations