Как получить изображение OpenCV из Python и использовать его на C++ в pybind11? ⇐ C++

[Гость]

I'm trying to figure out how it is possible to receive an OpenCV image from a Python in C++. I'm trying to send a callback function, from C++ to my Python module, and then when I call a specific python method in my C++ app, I can access the needed image.

Before I add more details, I need to add that there are already several questions in this regard including :

• how-to-convert-opencv-image-data-from-python-to-c
• pass-image-data-from-python-to-cvmat-in-c
• writing-python-bindings-for-c-code-that-use-opencv
• c-conversion-from-numpy-array-to-mat-opencv

but none of them have anything about

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Pybind11

. In fact they are all using the

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PyObject

(from

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Python.h

header) with and without

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Boost.Python

. So my first attempt is to know how it is possible in

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Pybind11

knowing that it has support for

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Numpy

arrays, so it can hopefully make things much easier.

Also On the

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C++

side,

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OpenCV

has two versions, 3.x and 4.x which 4.x as I've recently found, is

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C++11

compliant. on Python side, I used OpenCV

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3.x

and I'm on a crossroad of which one to choose and what implications it has when it comes to

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Pybind11

.

What I have tried so far: I made a quick dummy callback and tried passing a simple

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cv::Mat&

like this :

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#include  #include  #include  #include  namespace py = pybind11; ... void cpp_callback1(bool i, std::string id, cv::Mat img) {      auto timenow = chrono::system_clock::to_time_t(chrono::system_clock::now());     cout  

Источник: [url]https://stackoverflow.com/questions/60917800/how-to-get-the-opencv-image-from-python-and-use-it-in-c-in-pybind11[/url]