PDF Processing Pro Tables

# PDF 表格提取指南 针对生产环境的高级表格提取策略。 ## 目录 - 基础表格提取 - 多页表格 - 复杂表格结构 - 导出格式 - 表格检测算法 - 自定义提取规则 - 性能优化 - 生产环境示例 ## 基础表格提取 ### 使用 pdfplumber (推荐) python import pdfplumber with pdfplumber.open("report.pdf") as pdf: page = pdf.pages[0] tables = page.extract_tables() for i, table in enumerate(tables): print(f"nTable {i + 1}:") for row in table: print(row) ### 使用内置脚本 bash python scripts/extract_tables.py report.pdf --output tables.csv 输出: csv Name,Age,City John Doe,30,New York Jane Smith,25,Los Angeles Bob Johnson,35,Chicago ## 表格提取策略 ### 策略 1: 自动检测 让 pdfplumber 自动检测表格: python import pdfplumber with pdfplumber.open("document.pdf") as pdf: for page_num, page in enumerate(pdf.pages, 1): tables = page.extract_tables() if tables: print(f"Found {len(tables)} table(s) on page {page_num}") for table_num, table in enumerate(tables, 1): print(f"nTable {table_num}:") # 第一行通常是表头 headers = table[0] print(f"Columns: {headers}") # 数据行 for row in table[1:]: print(row) ### 策略 2: 自定义表格设置 通过自定义设置微调检测: python import pdfplumber table_settings = { "vertical_strategy": "lines", # 或 "text", "lines_strict" "horizontal_strategy": "lines", "explicit_vertical_lines": [], "explicit_horizontal_lines": [], "snap_tolerance": 3, "join_tolerance": 3, "edge_min_length": 3, "min_words_vertical": 3, "min_words_horizontal": 1, "keep_blank_chars": False, "text_tolerance": 3, "text_x_tolerance": 3, "text_y_tolerance": 3, "intersection_tolerance": 3 } with pdfplumber.open("document.pdf") as pdf: page = pdf.pages[0] tables = page.extract_tables(table_settings=table_settings) ### 策略 3: 显式边界 手动定义表格边界: python import pdfplumber with pdfplumber.open("document.pdf") as pdf: page = pdf.pages[0] # 定义边界框 (x0, top, x1, bottom) bbox = (50, 100, 5