The Tiff image plugin handles the RESOLUTION_UNIT field incorrectly,
see http://mail.python.org/pipermail/image-sig/2006-July/004011.html.
Markus Kemmerling
Medical University Vienna
Am 11.01.2007 um 10:42 schrieb Dennis Shimer:
> I have a tif image that at least 3 different programs can see the
> correct dpi information in
> (Irfanview, Gimp, Alchemy) but when I read the image using pil 1.6
>
> print im.info - shows only {'compression': 'raw'}
> dpix,dpiy=im.info['dpi'] - gives an exception
>
> and if I set it explicitely then using
> im.save(filename,dpi=(dpix,dpiy))
>
> Irfanview sees the new dpi.
> Gimp complains that "resoultion units are meaningless"
> and Alchemy sees no DPI info at all but doesn't complain.
>
> Is there any reason that there is so much inconsistancy in results, or
> a way to write dpi with pil that would be universally recognized?
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