[BioC] EBImage problem - requested image not found or could not be loaded
paolo.sonego at gmail.com
Mon Apr 27 15:56:55 CEST 2009
Thanks so much! Thanks to your suggestions my admin managed to solve the
It seems, if I understand correctly, that under gentoo the default
installation of ImageMagick doesn't include libXML support.
Emerging(gentoo-lingo to mean install, i guess) the ImageMagick package
with libXML support did the trick!
Gregoire Pau ha scritto:
> Hi Paolo,
> Your example is about loading the GIF image located at:
> It works fine on my system (using the same R and EBImage). The
> function readImage of EBImage relies on ImageMagick to load images.
> ImageMagick relies on libxml2 to get URL streams.
> Did you have an Internet access when running your example ? If yes,
> could you check if you can first download the GIF image (using
> download.file() in R) and then read it with readImage ? If not, it
> looks like that your ImageMagick library doesn't support URL streams
> (it's really unlikely but...). Does the following example work on your
> terminal 'display
> http://soap.genome.jp/tmp/mark_pathway_www3_api5320/eco00260.gif ' ?
> Did you build ImageMagick yourself ? Do you have libxml2 installed
> (type in a terminal 'xml2-config --version') ? Is the XML capability
> OK at the end of the configure step ?
> On most Linux distributions (Ubuntu, Debian, Fedora, CentOS), you
> don't have to care about these things because ImageMagick comes with
> all its external features (libXML, libTIFF, SVG, gs...) enabled. But I
> don't know for Gentoo. I would suggest you to try to check the
> presence of libxml2 and try to reinstall ImageMagick and to check the
> configure options.
> Best regards,
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