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2026 · Preprint

UniCoder: Unified Visual-to-Code Generation via Symbolic Rewards and Reference-Guided Code Optimization

Yaozhi Zheng; Yilei Jiang; Manyuan Zhang; Yuxuan Wan; Kaituo Feng; Tianshuo Peng; Bo Zhang; Xiangyu Yue

UniCoder trains a visual-to-code model for charts, SVGs and webpages. Its reinforcement-learning objective combines rendering checks, image similarity and code-derived visual attributes; low-reward training groups receive reference-code trajectories to improve exploration.

Scope and limitations

Experiments concern static visual reconstruction with one 8B backbone, including Design2Code and ScreenBench. Reference code is used during training; successful rendering does not prove interactive behavior. Extending the attribute extractor to new domains requires new schemas/prompts. Interactive interfaces, animation and mobile-app behavior are not evaluated.

Why it fits this collection

Explores training signals for recovering code from visual website references.

Publication and review details

Venue
arXiv
Status
Preprint
Publication / posting date
June 30, 2026
Date source
arXiv v1 submission date; no separate proceedings or journal publication was verified.
First arXiv submission
June 30, 2026
arXiv
2606.31732
Reviewed arXiv version
v1
DOI
10.48550/arXiv.2606.31732

At 2844ebd, the repository releases ChartMimic/UniSVG evaluation wrappers, not model weights, full training code or datasets. Original repository code is Apache-2.0; adapted benchmarks retain their own terms. The arXiv title includes “UniCoder”; the HTML heading and software citation omit that prefix. No artifacts were run.

Sources reviewed

Source review only; experiments were not rerun for this collection. Cite the original authors using the linked paper or BibTeX.

Primary sources

  1. https://arxiv.org/abs/2606.31732v1
  2. https://arxiv.org/html/2606.31732v1
  3. README.md GitHub · JimmyZhengyz/unicoder · Revision 2844ebd
  4. MODEL_RELEASE.md GitHub · JimmyZhengyz/unicoder · Revision 2844ebd
  5. LICENSE GitHub · JimmyZhengyz/unicoder · Revision 2844ebd
  6. THIRD_PARTY_NOTICES.md GitHub · JimmyZhengyz/unicoder · Revision 2844ebd