AUTHOR=Zhang Keke , Guan Mingyu , Wu Chao , Li Yutong , Lü Qingguo , Liu Yi , Wang Yi , Wang Wei , Zhang Wei 
  
TITLE=Deep learning-enabled hybrid systems for accurate recognition of text in seal images
  
JOURNAL=Frontiers in Big Data
  
VOLUME=Volume 8 - 2025
  
YEAR=2026
  
URL=https://www.frontiersin.org/journals/big-data/articles/10.3389/fdata.2025.1753871
  
DOI=10.3389/fdata.2025.1753871
  
ISSN=2624-909X
  
ABSTRACT=Chinese seals are widely used in various fields within Chinese society as a tool for certifying legal documents. However, recognizing text on these seals presents challenges due to background text, high noise levels, and minimalistic image features. This paper introduces a hybrid model to address these difficulties in Chinese seal text recognition. Our model integrates preprocessing techniques tailored for real seals, a deep learning-based position correction model, a circular text unwrapping model, and OCR text recognition. First, we apply a color-based method to effectively remove the black background text on seals, eliminating redundant information while retaining crucial features for further analysis. Next, we introduce an innovative image denoising algorithm to significantly improve the system's robustness in processing noisy seal images. Additionally, we develop a deep learning-based angle prediction network and create synthetic datasets that mimic real seal scenes, enabling optimal seal image positioning for enhanced text flattening and recognition, thus boosting overall system performance. Finally, polar coordinate transformation is employed to convert the circular seal into a rectangular image for more efficient text recognition. Experimental results indicate that our proposed methods effectively enhance the accuracy of seal text recognition.