On 09/21/2011 09:31 AM, Kevin Hughes wrote:
I am trying to create a python library from a class which uses opencv
2.3. I want to be able to pass numpy array's into the class where they
will be converted into cv::Mat's processed then converted back to numpy
array's and returned.
Here is a simple test class I am working on to get this working before
wrapping my own class. Currently I am just trying to receive a numpy
array concert to a cv::Mat, process it and then write it to file. After
this is working I will work on returning the processed array to python.
Without digging too deeply or getting into possibly better solutions,
try adding:
import_array();
inside your BOOST_PYTHON_MODULE block. Or maybe there's some opencv
initialization function you need to call that will do that for you. The
NumPy C-API (which I assume the numpy_to_mat function uses internally)
needs to be initialized when your module is imported, or you'll get
segfaults. The above call to import_array() is how you'd do it if you
were using the NumPy C-API headers directly. In any case, you need to
make sure it gets called somehow.
HTH
Jim Bosch
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