PDF (Portable Document Format) document structured analysis method based on weighted overlap ratio

By combining a weighted consistency scoring method with a configurable rule engine, the problems of inaccurate layout recognition and missing content in PDF document parsing are solved, achieving high-precision and robust structured parsing, which is suitable for parsing documents in multiple fields.

CN121807828APending Publication Date: 2026-04-07IOL WUHAN INFORMATION TECH CO LTD
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Patent Information

Application Number
CN202511896098.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

Existing PDF document parsing technologies suffer from problems such as inaccurate layout recognition, incorrect content classification, and missing document content when processing complex documents, making it difficult to meet the refined parsing needs of different fields.

Method used

By employing a weighted scalar approach, combined with a pre-trained layout analysis model and a configurable rule engine, and through cross-validation and correction of layout boxes and content object boxes, the layout-document content object tree is dynamically updated to achieve high-precision structured parsing.

Benefits of technology

It significantly improves the accuracy and robustness of layout recognition, can adapt to the document parsing needs of different fields, and improves the utilization efficiency of document data.

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Abstract

The invention discloses a PDF (Portable Document Format) document structured analysis method based on weighted overlap ratio, which comprises the following steps of: performing layout analysis, standardization and sorting processing on an original PDF document to obtain a layout frame of the original PDF document and a corresponding category label data set; carrying out content object extraction on the original PDF document and constructing to obtain a content object box set of the original PDF document; based on a weighted coincidence degree scoring method, obtaining an optimal attribution layout of the original PDF document content object, and identifying an abnormal scene; based on a configurable rule engine, performing cross validation and deviation correction on the layout frame and the content object frame, and dynamically updating the layout-document content object tree; and based on the dynamically updated layout-document content object tree, outputting an analysis result, and converting and storing the analysis result. According to the method, the problems of inaccurate layout identification, wrong content classification, document content missing and the like are solved, and high-precision, high-robustness and high-flexibility structured analysis of the complex PDF document is realized.
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