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From Tilman Hausherr <THaush...@t-online.de>
Subject Re: Chinese document: mangled characters, ASCII block code points off by 1
Date Thu, 03 Aug 2017 18:51:48 GMT

I just tested the files... bad news: only the digits can be extracted. 
The reason that the Chinese characters don't extract is similar to the 
case here:
Feel free to ask further questions.

That you got some output is because in 1.8 a lot of assumptions were 
done when ToUnicode was missing. Sometimes these were right, and 
sometimes not. The 2.0 versions don't make such assumptions so you get 


Am 03.08.2017 um 20:35 schrieb Zubiri, Tomas:
> Hey Tilman,
> I am sorry for the delay.
> I am indeed using version 1.8.3, I will update to 2.0.7 in order to solve the off by
one bug.
> Regarding the Chinese characters bug. I am extracting text from a pdf, not rendering.
> Here is what the documents look like.
> http://www.filedropper.com/1341025263
> http://www.filedropper.com/1308134649
> Here is the text I am extracting with our custom text extractor based on TextPosition
and PDFTextStripper from version 1.8.3
> http://www.filedropper.com/1341025263_1
> http://www.filedropper.com/1308134649_1
> Let me know if I missed something or if you need any additional info.
> Thanks!
> Tomas Zubiri
> Research Associate, Ownership
> S&P Global Market Intelligence
> Buenos Aires, Argentina
> tomas.zubiri@spglobal.com
> www.spglobal.com/marketintelligence
> -----Original Message-----
> From: Tilman Hausherr [mailto:THausherr@t-online.de]
> Sent: Thursday, August 03, 2017 1:41 PM
> To: users@pdfbox.apache.org
> Subject: Re: Chinese document: mangled characters, ASCII block code points off by 1
> Am 02.08.2017 um 00:16 schrieb Zubiri, Tomas:
>> Good afternoon,
>> http://www.filedropper.com/1308134649
>> The document linked above isn't being read correctly by PDFBox.
>> Characters in the ASCII block appear to be off by 1, for example,
>> numbers appear to be one value higher.
>> Should I upload this as a bug in JIRA?
> Despite you not answering, I was able to guess what you're trying to tell us.
> 1) You are using 1.8.* version. This is not very good in rendering, and it can't render
the chinese glyphs at all, and the numbers are off by one. Use 2.0.7.
> 2) The 2.0.7 renders the numbers correctly. (The cause in 1.8.* is that the internal
code is indeed off by one, this is a weirdness in the file and a bug in 1.8.*, but not a broken
PDF) The chinese glyphs do look chinese but in poor quality. This is a known and unsolved
problem and is described here:
> https://issues.apache.org/jira/browse/PDFBOX-3293
> Tilman
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