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https://issues.apache.org/jira/browse/PDFBOX-4692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16985305#comment-16985305
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Tilman Hausherr commented on PDFBOX-4692:
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{quote}what are we supposed to do in order to aggregate characters into lines
and lines into table columns and rows?
{quote}
You could collect all the rectangles (cyan color in the example, plus type 3
best guess), make an assumption which ones are near enough from others to be a
"block". Then extract these blocks with ExtractTextByArea for each,
alternatively set "beads" (see PDF specification) and call the normal
ExtractText only once. Of course there may be special cases, e.g when a block
is not rectangular.
> Document if and when PDFont.getFontDescriptor() may return null
> ---------------------------------------------------------------
>
> Key: PDFBOX-4692
> URL: https://issues.apache.org/jira/browse/PDFBOX-4692
> Project: PDFBox
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 2.0.17
> Environment: Windows 10.0.18362.418
> Reporter: Gili
> Priority: Major
> Attachments: image-2019-11-16-22-03-15-015.png
>
>
> Please document under which conditions {{PDFont.getFontDescriptor()}} may
> return null and what can be done to calculate the text ascent/descent.
> Clearly, this should be possible to calculate as the text ends up getting
> rendered.
> Background information:
> I have a PDF file (credit card statement, so it cannot be shared easily) that
> contains an embedded {{PDType3Font}} called "C0EX06Q0". When I invoke
> {{PDFont.getFontDescriptor()}} I get null.
> I have a screenshot of what it looks like.
> !image-2019-11-16-22-03-15-015.png|thumbnail!
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