PDF incomplete box line table extraction method, device and equipment and storage medium

Abstract

The invention provides a PDF incomplete box line table processing method which comprises the following steps: S1, analyzing a PDF page to obtain elements of the PDF page; s2, judging whether the analyzed elements at least comprise horizontal line segment elements and / or vertical line segment elements or not, and judging whether the PDF page comprises a table or not at least based on the characteristics of the horizontal line segment elements; s3, if the PDF page contains the table, judging whether the table is a complete box line table or an incomplete frame line table at least based on the characteristics of the vertical line segment elements; s4, if the table is an incomplete box line table, obtaining all text blocks in the PDF page and position information of each text block, and obtaining a preliminary table area in the PDF page at least based on the position information of each text block; and S5, based on the horizontal line segment elements and / or the vertical line segment elements, correcting the preliminary table area to obtain a corrected table area. The invention further provides a PDF incomplete box line table processing device, electronic equipment and a storage medium.

Description

technical field [0001] The present disclosure relates to a method, device, equipment and storage medium for extracting PDF incomplete boxline tables, and belongs to the technical field of PDF document recognition. Background technique [0002] PDF (Portable Document Format, Portable Document Format) is currently one of the most widely used document formats, mainly used for file exchange and printing, etc., and cannot interact with other computer programs. [0003] With the wide application of PDF in finance, scientific research, education and other fields, automatic recognition of PDF documents and extraction of useful data from them have become a concern. [0004] PDF documents are mainly composed of text, images, tables, formulas, etc. Among them, as an extremely efficient data organization and presentation method, table recognition has become an urgent problem to be solved. Table recognition includes table detection and table structure recognition. Table detection refers...

AI Technical Summary

Problems solved by technology

Among them, the recognition of complete framed forms is relatively simple, and the current open source PDF form extraction tool can achieve a high accuracy rate; the recognition of incomplete framed forms has many problems: for example, the accuracy of form detection is low (currently camelot , pdfplumber and other open source tools will mistakenly detect the text content outside the table into the table area), the table structure recognition is incomplete (the existing technology only performs basic table structure recognition, and does not merge the blank cells in the result, The readability of the table is poor and there are difficulties in subsequent use), the degree of automation is low (the table cannot be extracted completely automatically), etc.

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