That is some weird mojo; I'm guessing that numpy simply doesn't recognize the 'LA' type (luminance+alpha) as it's pretty uncommon. In the meantime you probably want to convert to RGBA, since that file giving you problems is grayscale+alpha channel, and a conversion to RGB might lose the alpha channel. FWIW that's pretty much what matplotlib does, see matplotlib.image.pil_to_array which does the conversion fine. David On 7-Jul-09, at 8:07 PM, Nicolas Pinto wrote:

Dear all,

For some reason I have a problem converting a specific png image using array().

Here is what I am getting (using numpy 1.3.0 and scipy 0.7.0).

% wget http://files.getdropbox.com/u/167753/spiky_adj_023.png % python -c "import numpy as np; import Image; print np.array(Image.open('spiky_adj_023.png'))"

% wget http://files.getdropbox.com/u/167753/spiky_norm_001.png % python -c "import numpy as np; import Image; print np.array(Image.open('spiky_norm_001.png'))" [[134 30 140 ..., 230 83 59] [ 99 202 233 ..., 160 63 133] [ 93 241 35 ..., 7 240 101] ..., [206 132 196 ..., 139 190 112] [218 21 217 ..., 121 152 109] [ 83 188 187 ..., 6 240 251]]

I was initially using scipy's misc.imread when I found this bug. I am currently using the following workaround: % python -c "import numpy as np; import Image; print np.array(Image.open('spiky_adj_023.png').convert('RGB'))"

Let me know what you think.

Thanks in advance.

Sincerely,

-- Nicolas Pinto Ph.D. Candidate, Brain & Computer Sciences Massachusetts Institute of Technology, USA http://web.mit.edu/pinto _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion