Author

Zhi-chang Guo

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Preprint Sep 2026

GR-FM: Geometrically Regularized Flow Matching for SDF-Based Medical Image Segmentation

Medical image segmentation remains challenging in terms of accurate boundary localization and complex-structure preservation, as target regions often exhibit weak boundaries, fine-grained structures, and irregular shapes, while high-quality images and precise annotations are usually limited. Existing generative segment...

Yu-Xin Ai, Zhi-Chang Guo, Fang-Hui Song et al. · 0 citations

Preprint Aug 2026

A geometry-based deep equilibrium model for image restoration under multiplicative Gamma noise

Experimental results on both grayscale and color image restoration demonstrate that the proposed method consistently outperforms representative model-based approaches while achieving performance comparable to state-of-the-art DEQ models based on implicit regularization, despite requiring substantially fewer trainable p...

Shengkun Yang, Luca Ratti, Zhi-Chang Guo · 0 citations