用对比度评估古籍修复图像质量，效果优于传统方法。
Reconstructing Historical Manuscripts through MSI: The Potential of Contrast in Assessing Image Quality and Legibility
- 基于多光谱成像数据，用对比度指标评估修复图像质量。
- 潜在对比度与专家评分相关性最高，信噪比与客观评测最一致。
- 适合古籍数字化、文化遗产保护领域的质量评估需求。
数字修复历史手稿图像旨在提升可读性的同时保留文化遗产的真实性。然而，修复图像的质量评估仍具挑战性，因为可读性主观性强，且专家标注稀缺。本研究探讨了基于对比度的图像质量度量在多光谱成像重建手稿图像中的适用性。通过两个公开数据集开展实验，由专家手动评分，并以全参考图像质量度量为基准。结果表明，潜在对比度与专家评分相关性最高，对比度-噪声比与全参考度量一致性最强。总体而言，对比度类指标持续优于通用图像质量度量，展现出作为手稿可读性与重建质量客观指标的潜力。
原文摘要 · Abstract (English)
Digital restoration of historical manuscript images aims to improve readability while preserving the authenticity of cultural heritage documents. However, evaluating quality of restored manuscripts remains challenging, where readability is often subjective and expert annotations are scarce. This study investigates the suitability of contrast-based image quality measures to assess quality and legibility of reconstructed manuscript images from multi-spectral imaging. Two experiments were conducted with publicly-available data sets, facilitating manual quality scores by experts and full-reference image quality measures as reference evaluations. The results show that potential contrast achieves the highest correlation with expert ratings, while contrast-to-noise ratio demonstrates the strongest agreement with full-reference quality measures. Overall, contrast-based measures consistently outperform general image quality measures, demonstrating their potential as objective indicators of manuscript legibility and reconstruction quality.
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