Python C++ binding in OpenCV

Question

What technique/library is used for Python binding in OpenCV2.0?

I am aware there there are a number of libraries for C++/Python binding and that previous versions of OpenCV were using SWING library.

I am testing Python in Python Tools for Visual Studio which has code completition (intellisense) built in. However, for current OpenCV Python bindings it displays only function names in interactive window. In editor, it does not even display the function names.

Is it possible to have intellisense working on parameter level for C++ Python bindings?

answers.opencv.org/question/6618/how-python-api-is-generated — Abid Rahman K
– Abid Rahman K, Commented Apr 19, 2013 at 18:38
@AbidRahmanK: You should post that as an answer. Unless you think the question needs to be closed, what else could an answer say besides that link, and maybe a brief summary of its contents? — abarnert
– abarnert, Commented Apr 19, 2013 at 18:47

Community · Accepted Answer · 2017-05-23 12:22:56Z

3

What technique/library is used for Python binding in OpenCV2.0?

Vadim Pisarevsky, one of the core developers of OpenCV, has given a brief answer for this question here: How Python API is generated?. He says:

We do not use SWIG or any other standard wrapper generation tool. We did not find such tools that would produce satisfying results.

Instead, we use our own purely Python-based solution for parsing OpenCV headers

The parser is at opencv/modules/python/src2/hdr_parser.py

After all the API is extracted, we use some more python code (opencv/modules/python/src2/gen2.py) to produce Python wrappers.

edited May 23, 2017 at 12:22

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answered Apr 19, 2013 at 18:55

Abid Rahman K

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4 Comments

Ekalic Over a year ago

Does it mean that if OpenCV used different binding, the code competition would work? Or am I doing something wrong?

Abid Rahman K Over a year ago

I am sorry, I didn't get "code competition"? Did you mean code completion? If so, default Python IDLE in windows has code completion. It even shows arguments also.

Raoul Over a year ago

@AbidRahmanK Do you think that trying to use cython to call the C++ api for OpenCV would provide a speed gain over using the standard python bindings?

Abid Rahman K Over a year ago

@Raoul: sorry, no idea. As far as I know, Cython is a translator from Python to C. So I doubt if it will bring any speed gain over original C.

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