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https://issues.apache.org/jira/browse/PDFBOX-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14946324#comment-14946324
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Andreas Meier edited comment on PDFBOX-2998 at 10/7/15 6:03 AM:
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I just wanted to fuel the discussion with my snippet.
My intention is not to provide code that breaks an already great extraction
engine ;)
{quote}
I'd even start a step before that
{quote}
Depends on what is possible at the lower Levels...
I don't know if I am the right person to take part in that discussion any
further, but I will try to provide the "simple view" on a higher level, to
address the problem:
- Might it be useful to hold some Information like "(Hello World)" in a
(meta-)information store, so that pdfbox can later take the single characters
and form the word again? (No fonttype or -size needed, just simple character
matching based on position and Rotation...)
- Would it make sense to check for fonttype and -size and just handle cases
like chemical names? [~tboehme] are there any other reasons for different
font/size in a word you know?
was (Author: andreasmeier):
I just wanted to fuel the discussion with my snippet.
My intention is not to provide code that breaks an already great extraction
engine ;)
{quote}
I'd even start a step before that
{quote}
Depends on what is possible at the lower Levels...
I don't know if I am the right person to take part in that discussion any
further, but I will try to provide the "simple view" on a higher level, to
address the problem:
- Might it be useful to hold some Information like "(Hello World)" in a
(meta-)information store, so that pdfbox can later take the single characters
and form the word again? (No fonttype or -size needed, just simple character
matching based on position and Rotation...)
- Would it make sense to check for fonttype and -size and just handle cases
like checmical names ([~tboehme] are there any other reasons for different
font/size in a word you know?)
> Enhance the text extraction capabilities
> ----------------------------------------
>
> Key: PDFBOX-2998
> URL: https://issues.apache.org/jira/browse/PDFBOX-2998
> Project: PDFBox
> Issue Type: Improvement
> Components: Text extraction
> Affects Versions: 2.0.0
> Reporter: Andreas Meier
> Attachments: TextBehindText.pdf
>
>
> PDFBox will need some -document layout analysis tools- enhancement to the
> current text extraction to extract text correctly.
> At the Moment the text of a document is extracted using the position of
> single characters.
> This may lead to wrong results, due to the format of the file.
> There are good tools such as https://code.google.com/p/lapdftext which we
> could use to compare our current output.
> Possible enhancements are
> - enhance matching of text to a certain line i.e. don't mix up text from
> different lines
> - better handling of rotated text
> - handling of vertical text
> - ability to get additional text properties such as font, font size ...
> Some of these are already logged as individual tickets
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