Papers by Derek Greene
PreP-OCR: A Complete Pipeline for Document Image Restoration and Enhanced OCR Accuracy (2025.acl-long)
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| Challenge: | Existing pipelines that combine document image restoration with semantic-aware post-OCR correction can improve text extraction from degraded images. |
| Approach: | They propose a two-stage pipeline that combines document image restoration with semantic-aware post-OCR correction to enhance both visual clarity and textual consistency. |
| Outcome: | The proposed pipeline reduces character error rates by 63.9-70.3% on 13,831 pages of real historical documents in English, French, and Spanish compared to OCR on raw images. |
A Novel Perspective to Look At Attention: Bi-level Attention-based Explainable Topic Modeling for News Classification (2022.findings-acl)
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| Challenge: | Existing deep learning models have the attention mechanism to improve performance, but the inherent characteristics of deep learning model complexity and the flexibility of the attention structure make them difficult to explain. |
| Approach: | They propose a two-tier attention architecture to decouple the complexity of explanation and the decision-making process by using large-scale news corpora. |
| Outcome: | The proposed model can achieve competitive performance with state-of-the-art models and illustrates its appropriateness from an explainability perspective. |
Advancing Post-OCR Correction: A Comparative Study of Synthetic Data (2024.findings-acl)
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| Challenge: | Optical Character Recognition (OCR) is a useful tool for preserving cultural heritage and supporting downstream tasks. |
| Approach: | They propose an algorithm that leverages computer vision feature detection algorithms to calculate glyph similarity for constructing post-OCR synthetic data. |
| Outcome: | The proposed method significantly reduces CERs in low-resource languages without manually annotating data. |
Effective Synthetic Data and Test-Time Adaptation for OCR Correction (2024.emnlp-main)
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| Challenge: | Recent research has framed the post-OCR task as a Seq2Seq Neural Machine Translation (NMT) task. |
| Approach: | They propose a method for constructing post-OCR synthetic data with different noise levels using weak supervision. |
| Outcome: | The proposed method reduces CER by 68.67% without relying on manual annotations. |