自动比对日本建筑许可文件，高效识别修订差异。
Hybrid Multi-Phase Page Matching and Multi-Layer Diff Detection for Japanese Building Permit Document Review
- 分七阶段匹配页码，结合结构与动态规划算法。
- 在真实数据上实现准确率100%、F1值0.80。
- 适合需要精准审核许可文件的工程团队使用。
我们提出一种混合多阶段页面匹配算法，用于自动化比对日本建筑许可文档集。日本建筑许可审查需跨版本交叉核对大量PDF文档，人工操作耗时且易出错。该算法融合最长公共子序列（LCS）结构对齐、七阶段共识匹配流程以及动态规划最优对齐阶段，即使页面顺序、编号或内容发生显著变化，也能稳健地配对各版本页面。后续的多层差异检测引擎包含文本级、表格级和像素级视觉比对，生成高亮差异报告。在真实许可文档集上的评估显示，基于人工标注基准的F1值达0.80，精确率为1.00，且无假阳性匹配对。
原文摘要 · Abstract (English)
We present a hybrid multi-phase page matching algorithm for automated comparison of Japanese building permit document sets. Building permit review in Japan requires cross-referencing large PDF document sets across revision cycles, a process that is labor-intensive and error-prone when performed manually. The algorithm combines longest common subsequence (LCS) structural alignment, a seven-phase consensus matching pipeline, and a dynamic programming optimal alignment stage to robustly pair pages across revisions even when page order, numbering, or content changes substantially. A subsequent multi-layer diff engine -- comprising text-level, table-level, and pixel-level visual differencing -- produces highlighted difference reports. Evaluation on real-world permit document sets achieves F1=0.80 and precision=1.00 on a manually annotated ground-truth benchmark, with zero false-positive matched pairs.
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