CODEWITHSUNDEEP
pythonc++opencvnumpyboost-python
ssk
ssk

Reputation: 9265

Converting numpy.ndarray into opencv cv::Mat

I have Boost-Python interface for C++ OpenCv. I am getting this error when I invoke a C++ method from python:

Boost.Python.ArgumentError: Python argument types in
    Vision.process(Vision, numpy.ndarray, numpy.ndarray)
did not match C++ signature:
    process(python::vision::PythonVision {lvalue}, cv::Mat {lvalue}, cv::Mat {lvalue})

I am using python cv2.so module. How do I convert numpy.ndarray into cv::mat?

Upvotes: 1

Views: 1623

Answers (1)

ssk
ssk

Reputation: 9265

I used the following project:https://github.com/Algomorph/pyboostcvconverter and statically linked to it.

Note (To avoid segmentation fault):

1) PY_ARRAY_UNIQUE_SYMBOL should be defined where import_array is invoked In other places where is included, use NO_IMPORT_ARRAY

#define PY_ARRAY_UNIQUE_SYMBOL PYVISION_ARRAY_API
#include <pyboostcvconverter/pyboostcvconverter.hpp>

2) Invoke init_ar from the BOOST_PYTHON_MODULE

/**
 * @brief Initialize Numpy Array
 */
static void init_ar( )
{
    // initialize
    Py_Initialize();

    // defined in numpy
    import_array();
}

Upvotes: 1

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