The Ultimate Guide to Assessing Table Extraction
Blog post from Nanonets
The text discusses the challenges of table extraction from documents, which involves parsing text, recognizing structure, and preserving spatial relationships between cells. The authors introduce two advanced metrics for evaluating table extraction accuracy: TEDS (Tree Edit Distance-based Similarity) and GRITS (Grid-based Recognition of Information and Table Structure). TEDS measures similarity by comparing the tree edit distance between two HTML representations of tables, while GRITS frames tables as 2D arrays and identifies the largest common substructure using flexible matching criteria. The authors conclude that each metric has its strengths and weaknesses, and recommend using GriTS as a comprehensive metric for table extraction evaluation.
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