[sane-devel] TIFF to PDF at 300dpi?

m. allan noah kitno455 at gmail.com
Wed Apr 12 16:38:59 UTC 2017

do your tiffs have XResolution and YResolution tags in them before you convert?


On Wed, Apr 12, 2017 at 11:05 AM, Manuel Reiter <manuel at reiter.pm> wrote:
> Hi all,
> this might be a bit off topic here and if that's against this list's policy, I apologize in advance, but I've been websearching literally for hours now without finding a solution and I figure somebody here might have had the same problem before.
> I want to convert a TIFF, scanned at 300 dpi, to a PDF of the same size and dpi. From my searches, this should be achievable both with ImageMagick's "convert" with output option "-r300" and with ghostscript and "-dPDFSETTINGS=/printer". However, both approaches don't work for me. convert resamples the image to 72 dpi while ghostscript correctly embeds the image at full resolution but does apparently not set the required metadata for the PDF/embedded image resolution to be recognised as 300 dpi.
> Any ideas anybody? Suggestions where else to ask are also highly welcome. Thanks in advance!
> Cheers,
> Manuel
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