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Old 02-12-2009, 05:10 AM   #1
Registered: Nov 2006
Location: Kerala, India
Distribution: Arch Linux
Posts: 134

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Exclamation unable to read images using 'pymorph' in python

I am trying to do some image processing work on python. I load the image using python imaging library. I want to do some morphological operations on the image. So, I used pymorph.
I couldn't apply the morphological operations using pymorph, on the images read using pil. I dont know why. Please help on this.

Next, I tried to read the image directly using pymorph.readgray() function. I am trying to read an RGB image. But, I got these error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.5/site-packages/pymorph-0.90b-py2.5.egg/pymorph/", line 3571, in readgray
if numpy.alltrue(numpy.alltrue(y[0,:,:] == y[1,:,:] and
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
Please help me on this too.

I would also like to know, what libraries are useful for doing image processing applications.

Thanks and regards
Old 02-14-2009, 12:05 AM   #2
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Registered: Aug 2003
Location: Sydney
Distribution: debian
Posts: 1,495

Rep: Reputation: 48
I am not familiar with polymorph. Is it designed to work with PIL? If not there is no reason to expect them to deal with images in a compatible way.

As for pymorph.readgray() maybe it is just not smart enough to convert the RGB image as it loads. Can you convert to grayscale before you try to load it? For example using the conversion tools in the netpbm package (or even with PIL for that matter)?


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