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https://issues.apache.org/jira/browse/PDFBOX-6050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18012876#comment-18012876
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Antonio Pozo commented on PDFBOX-6050:
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I just attached the file [^fw8ben_filled (1).pdf]
^The library versión is 3.0.5^
> Japanese text not rendered when converting editable PDFs to images
> ------------------------------------------------------------------
>
> Key: PDFBOX-6050
> URL: https://issues.apache.org/jira/browse/PDFBOX-6050
> Project: PDFBox
> Issue Type: Bug
> Reporter: Antonio Pozo
> Priority: Major
> Attachments: fw8ben_filled (1).pdf
>
>
> We are using the PDFBox library to convert PDF documents to images. We have
> found that, for many _editable_ PDFs containing Japanese text (PDF forms),
> the generated images do not display the Japanese characters (it seems PDFBox
> is unable to extract/render them). Text in other languages within the same
> document is rendered correctly.
> This issue does *not* occur with non-editable PDFs — in those cases, Japanese
> text is rendered without problems.
> We have observed that if we open these editable PDFs in a PDF editor and
> simply save them again (without making any changes), PDFBox is then able to
> generate the images with the Japanese text rendered correctly. We have also
> tried setting a [font that supports the Japanese
> alphabe|https://fonts.google.com/noto/specimen/Noto+Sans+JP]t in the library
> before converting the PDF to an image, without success.
> Other tools (such as Adobe Reader) are able to display and extract the
> Japanese text from these editable PDFs without requiring the open-and-save
> step.
> *Expected behavior:*
> When converting editable PDFs containing Japanese text to images, the
> Japanese characters should be rendered correctly without requiring the
> document to be re-saved.
> *Actual behavior:*
> When converting editable PDFs containing Japanese text to images, the
> Japanese characters are missing in the generated images, while text in other
> languages is rendered correctly.
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