Pull request at <https://github.com/matplotlib/matplotlib/pull/616>
Christoph
On 12/9/2011 12:11 PM, Christoph Gohlke wrote:
> Hello,
>
> while working on the scikits-image io plugin system, I noticed some
> issues with matplotlib's imread function. I have a patch for all these
> issues and will submit a PR but wanted to check on the list first.
>
>
> 1) imread does not properly detect the file type if an open file handle
> is used.
>
>>>> lena = pylab.imread(matplotlib.cbook.get_sample_data('lena.jpg'))
> Traceback (most recent call last):
> File "<stdin>", line 1, in<module>
> File "X:\Python27\lib\site-packages\matplotlib\pyplot.py", line 1740,
> in imread
> return _imread(*args, **kwargs)
> File "X:\Python27\lib\site-packages\matplotlib\image.py", line 1207,
> in imread
> return handler(fname)
> RuntimeError: _image_module::readpng: file not recognized as a PNG file
>
>
> 2) imread does not properly convert uint16 images to uint8 as reported
> on the scikits-image ML
> <https://groups.google.com/forum/#!topic/scikits-image/O47tNU01kLA>.
>
>
> 3) Any non-PNG image loaded with imread is displayed upside-down in imshow:
>
>>>> imshow(imread("lena.jpg")); show()
>
> A solution is to pass `origin='lower'` to imshow for non-PNG images. But
> is there a reason for this asymmetry? Any image loaded with PIL is
> explicitly flipped upside-down at
> <https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/image.py#L1267>.
>
>
> Christoph
>
>
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------------------------------------------------------------------------------
Cloud Services Checklist: Pricing and Packaging Optimization
This white paper is intended to serve as a reference, checklist and point of
discussion for anyone considering optimizing the pricing and packaging model
of a cloud services business. Read Now!
http://www.accelacomm.com/jaw/sfnl/114/51491232/
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