problem with io.imread

[Julien Derr]

Thanks everyone for all the answers, 

I tried to desinstal reinstall with many variations. my last choice was : 

scikit-image==0.12dev
 easy_install -U scikit-image

I tried your option; with plugin='matplotlib' and still get the following 
error message, so it looks like I have indeed a problem with a jpeg 
decoder, but I checked that  
I have the package libjpeg8 installed already.



Traceback (most recent call last):
  File "test.py", line 17, in <module>
    rgb=io.imread(cheminfichier,plugin='matplotlib')
  File 
"/usr/local/lib/python2.7/dist-packages/scikit_image-0.12dev-py2.7-linux-x86_64.egg/skimage/io/_io.py", 
line 100, in imread
    img = call_plugin('imread', fname, plugin=plugin, **plugin_args)
  File 
"/usr/local/lib/python2.7/dist-packages/scikit_image-0.12dev-py2.7-linux-x86_64.egg/skimage/io/manage_plugins.py", 
line 207, in call_plugin
    return func(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 
2215, in imread
    return _imread(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/image.py", line 
1254, in imread
    im = pilread(fname)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/image.py", line 
1235, in pilread
    return pil_to_array(image)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/image.py", line 
1344, in pil_to_array
    x = toarray(im)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/image.py", line 
1327, in toarray
    x_str = im.tobytes('raw', im.mode)
  File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 661, in 
tobytes
    self.load()
  File "/usr/local/lib/python2.7/dist-packages/PIL/ImageFile.py", line 203, 
in load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 419, in 
_getdecoder
    raise IOError("decoder %s not available" % decoder_name)
IOError: decoder jpeg not available







On Wednesday, April 29, 2015 at 6:21:21 PM UTC+2, Julien Derr wrote:
>
> Hi everyone, 
> I have a very basic problem, but I have no idea how to solve it !
> I installed scikitimage on a new computer, and I cannot manage to load an 
> image with the io module
>
> from skimage import io,  works fine : 
>
> Variable   Type      Data/Info
> ------------------------------
> filename   str       ./small.jpg
> io         module    <module 'skimage.io' 
> from<...>skimage/io/__init__.pyc'>
>
> but when I want to load my image: I get the error
>
> In [5]: camera = io.imread(filename)
>
> ValueError: Could not load "./small.jpg"
> Please see documentation at: 
> http://pillow.readthedocs.org/en/latest/installation.html#external-libraries
>
>
> I went on the website where they ask to unistall PIL before installing 
> pillow, this is what I did, and still I get the error ...
>
> any ideas ? 
>
>
> thanks a lot!
>
> Julien
>
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