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https://issues.apache.org/jira/browse/PDFBOX-1734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898258#comment-13898258
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Tilman Hausherr commented on PDFBOX-1734:
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What I can do for myself isn't important, because it is already done, see the
attached patch.
What I want to do is that PDFBOX can create TIFF files, have the dpi inside,
and use the correct compression i.e. G4 for b/w images and something else (e.g.
LZW) for the rest.
> ImageIoUtil.WriteImage doesn't work with tiff images
> ----------------------------------------------------
>
> Key: PDFBOX-1734
> URL: https://issues.apache.org/jira/browse/PDFBOX-1734
> Project: PDFBox
> Issue Type: Improvement
> Components: Rendering
> Environment: XP, W7
> Reporter: Tilman Hausherr
> Priority: Minor
> Labels: tiff
> Attachments: ImageIOUtil.patch, TestImageIOUtils.patch
>
>
> ImageIoUtil.WriteImage brings an I/O error exception when trying to write a
> tiff file. Debugging shows that the cause is "Bits per sample must be 1 for
> RLE compression!". This means that the compression used (the first one of the
> following list, returned by writerParams.getCompressionTypes() ) is only
> allowed for bitonal images.
> CCITT RLE
> CCITT T.4
> CCITT T.6
> LZW
> JPEG
> ZLib
> PackBits
> Deflate
> EXIF JPEG
> After correcting this, the next problem was that tiff images didn't have the
> proper resolutions. I added that too. Yes it uses the com.sun.* classes;
> however there is no other way. Even apache xmlgraphics uses them, although in
> a very different way than I do
> https://svn.apache.org/repos/asf/xmlgraphics/commons/tags/commons-1_3_1/src/java/org/apache/xmlgraphics/image/writer/imageio/ImageIOTIFFImageWriter.java
> writeImage() has a parameter "int imageType" which is never used. Why?
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