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https://issues.apache.org/jira/browse/PDFBOX-2078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14000095#comment-14000095
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Tilman Hausherr commented on PDFBOX-2078:
-----------------------------------------
The dpi isn't part of the BufferedImage, it is calculated into a zoom factor
for rendering. So you have to pass it as a parameter again when saving, it is
meta data, and its use is not properly supported by ImageIO (look at the source
code of ImageIOUtils :-) )
> DPI always 96
> -------------
>
> Key: PDFBOX-2078
> URL: https://issues.apache.org/jira/browse/PDFBOX-2078
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.5
> Reporter: proba
> Assignee: Tilman Hausherr
>
> I'm trying to convert a 1 page pdf report to an image using convertToImage.
> My used command goes as follows:
> BufferedImage bi=page.convertToImage(BufferedImage.TYPE_INT_RGB, 300);
> No matter how much i change the resolution (300 in the example), the DPI
> stays the same, even though the quality and the dimensions of the picture
> change.
> Adding a comparison between a 96 resolution picture and what should be a 300
> resolution picture (notice the DPI)
> http://i58.tinypic.com/9sv339.png
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