Zero-Shot Synthetic-to-Real Handwritten Text Recognition via Task Analogies
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866917400027332608 |
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| author | Garrido-Munoz, Carlos Panariello, Aniello Cascianelli, Silvia Porrello, Angelo Calderara, Simone Calvo-Zaragoza, Jorge Cucchiara, Rita |
| author_facet | Garrido-Munoz, Carlos Panariello, Aniello Cascianelli, Silvia Porrello, Angelo Calderara, Simone Calvo-Zaragoza, Jorge Cucchiara, Rita |
| contents | Handwritten Text Recognition (HTR) models trained on synthetic handwriting often struggle to generalize to real text, and existing adaptation methods still require real samples from the target domain. In this work, we tackle the fully zero-shot synthetic-to-real generalization setting, where no real data from the target language is available. Our approach learns how model parameters change when moving from synthetic to real handwriting in one or more source languages and transfers this learned correction to new target languages. When using multiple sources, we rely on linguistic similarity to weigh their contrubition when combining them. Experiments across five languages and six architectures show consistent improvements over synthetic-only baselines and reveal that the transferred corrections benefit even languages unrelated to the sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_09713 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Zero-Shot Synthetic-to-Real Handwritten Text Recognition via Task Analogies Garrido-Munoz, Carlos Panariello, Aniello Cascianelli, Silvia Porrello, Angelo Calderara, Simone Calvo-Zaragoza, Jorge Cucchiara, Rita Computer Vision and Pattern Recognition Handwritten Text Recognition (HTR) models trained on synthetic handwriting often struggle to generalize to real text, and existing adaptation methods still require real samples from the target domain. In this work, we tackle the fully zero-shot synthetic-to-real generalization setting, where no real data from the target language is available. Our approach learns how model parameters change when moving from synthetic to real handwriting in one or more source languages and transfers this learned correction to new target languages. When using multiple sources, we rely on linguistic similarity to weigh their contrubition when combining them. Experiments across five languages and six architectures show consistent improvements over synthetic-only baselines and reveal that the transferred corrections benefit even languages unrelated to the sources. |
| title | Zero-Shot Synthetic-to-Real Handwritten Text Recognition via Task Analogies |
| topic | Computer Vision and Pattern Recognition |
| url | https://arxiv.org/abs/2604.09713 |