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