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Inconsistent Multi-Line Cell Extraction in Tables Using Textract.
Hi,
I'm using Amazon Textract to extract tables from PDFs, and I’ve noticed an inconsistency when handling multi-line cell values.
In some cases, a string that spans three rows in the PDF is correctly extracted as a single cell value, which is the expected behavior. However, in other instances, only the last line of the three is being extracted as the value, while the first two lines are either ignored or mistakenly treated as a separate header.
This inconsistency is affecting data accuracy and structure. Has anyone experienced something similar or found a reliable way to handle multi-line cell extraction consistently?
Thanks in advance!
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The issue you're experiencing with inconsistent multi-line cell extraction in tables using Amazon Textract is a known challenge. Textract can sometimes struggle with complex table structures, especially when dealing with multi-line cell values.
To address this problem, you can try several approaches:
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Image quality: Ensure that your PDF documents are of high quality with clear, well-defined table borders and text. Poor image quality or faint lines can lead to extraction errors.
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Pre-processing: Consider pre-processing your PDFs to enhance table borders and improve contrast before submitting them to Textract.
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Post-processing: Implement custom post-processing logic to handle cases where Textract fails to correctly extract multi-line cell values. This might involve analyzing the spatial relationships between extracted text elements and reconstructing the table structure accordingly.
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Use latest version: Make sure you're using the most recent version of Textract, as AWS frequently updates the service to improve its capabilities.
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Custom parsing: If Textract's table extraction continues to be problematic, you might need to implement your own table parsing logic using the raw text extraction from Textract. This gives you more control over how the data is structured.
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Confidence scores: Utilize the confidence scores provided by Textract to identify potentially problematic extractions. You may need to manually review or adjust extractions with lower confidence scores.
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Multiple processing attempts: Consider processing the document multiple times with different settings or APIs (e.g., using both table extraction and text detection) and compare the results to find the most consistent output.
If these approaches don't fully resolve the issue, you may want to contact AWS support for further assistance. They might be able to provide more specific guidance or investigate if there's an underlying issue with the Textract service itself.
Remember that while Textract is a powerful tool, it's not perfect, and there may be cases where manual intervention or additional processing is necessary to ensure all crucial data is captured accurately, especially for complex table structures with multi-line cell values.
Sources
AWS Textract Missing Crucial Data in a Table | AWS re:Post
If AWS Textract itself makes a mistake by extracting the same table into different columns, what should be done? I want to merge all the tables to a single table in CSV. | AWS re:Post
answered a year ago
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