Add option to extract line-based bounding boxes from pdfminer. #874
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We have been using pdfminer's layout detection to group text into boxes. This can cause issues, especially with table extraction, when the boxes don't line up with cells or what we detect with the DETR model. This change adds support for an object_type parameter to the PdfMinerExtractor that can be set to "boxes" (the current behavior), or "lines", which groups characters into lines, but does not group them further. To avoid an explosion of options, we introduce a "text_extractor_options" dict as a paramter, and refactor the TextExtractor class hierarchy a bit to support it.
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We have been using pdfminer's layout detection to group text into boxes. This can cause issues, especially with table extraction, when the boxes don't line up with cells or what we detect with the DETR model. This change adds support for an object_type parameter to the PdfMinerExtractor that can be set to "boxes" (the current behavior), or "lines", which groups characters into lines, but does not group them further.
To avoid an explosion of options, we introduce a
"text_extractor_options" dict as a paramter, and refactor the TextExtractor class hierarchy a bit to support it.