Add heading_segment: heading vs body classification + document outline#390
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Nothing mapped line height to heading levels or built a section outline; ocr/structure and element_parse are positional and text_blocks doesn't rank. Apply the standard heuristic: a line taller than heading_ratio x the median line height is a heading, and distinct heading heights become levels (tallest = 1). classify_lines tags each line; outline returns the headings in order.
Up to standards ✅🟢 Issues
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| Metric | Results |
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| Complexity | 31 |
| Duplication | 0 |
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摘要
新增
classify_lines/outline— 以 box 高度區分標題與內文並建立文件大綱。框架中沒有功能把行高對應到標題層級或建立章節大綱(ocr/structure/element_parse純屬位置性,text_blocks不排序)。本功能套用標準啟發法:行高超過
heading_ratio× 中位行高者為標題,不同的標題高度成為層級(最高 = 1)。classify_lines為每行標記{box, text, role, level};outline依上到下順序回傳標題作為目錄。純標準函式庫,作用於純行字典;重用table_grid_fill的框邊界讀取器。Qt-free。五層
utils/heading_segment/—classify_lines、outline。AC_classify_lines+AC_outline/ MCPac_classify_lines+ac_outline/ Script Builder(OCR)。測試
test_heading_segment_batch.py— 標題/內文標記與層級、純內文無標題、outline 依序、空輸入、wiring + facade。6 passed。ruff / bandit / radon / float-scan / Qt-free 全乾淨。