Image-based Freeform Handwriting Authentication with Energy-oriented Self-Supervised Learning
<|reference_start|>Image-based Freeform Handwriting Authentication with Energy-oriented Self-Supervised Learning: Freeform handwriting authentication verifies a person's identity from their writing style and habits in messy handwriting data. This technique has gained widespread attention in recent years as a valuable tool for various fields, e.g., fraud prevention and cultural heritage protection. However, it still remains a challenging task in reality due to three reasons: (i) severe damage, (ii) complex high-dimensional features, and (iii) lack of supervision. To address these issues, we propose SherlockNet, an energy-oriented two-branch contrastive self-supervised learning framework for robust and fast freeform handwriting authentication. It consists of four stages: (i) pre-processing: converting manuscripts into energy distributions using a novel plug-and-play energy-oriented operator to eliminate the influence of noise; (ii) generalized pre-training: learning general representation through two-branch momentum-based adaptive contrastive learning with the energy distributions, which handles the high-dimensional features and spatial dependencies of handwriting; (iii) personalized fine-tuning: calibrating the learned knowledge using a small amount of labeled data from downstream tasks; and (iv) practical application: identifying individual handwriting from scrambled, missing, or forged data efficiently and conveniently. Considering the practicality, we construct EN-HA, a novel dataset that simulates data forgery and severe damage in real applications. Finally, we conduct extensive experiments on six benchmark datasets including our EN-HA, and the results prove the robustness and efficiency of SherlockNet.<|reference_end|>
@article{wang2024image-based,
    title={Image-based Freeform Handwriting Authentication with Energy-oriented
  Self-Supervised Learning},
    author={Jingyao Wang, Luntian Mou, Changwen Zheng, Wen Gao},
    journal={arXiv preprint arXiv:2408.09676},
    year={2024},
    archivePrefix={arXiv},
    eprint={2408.09676},
    primaryClass={cs.CV}
}