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how to understand which functions available in python bindings?

asked 2012-08-21 01:25:32 -0600

mrgloom gravatar image

updated 2012-08-21 04:22:42 -0600

How to understand which functions are available in python bindings? I only found old documentation. For example which functions can be used for keypoint extraction(cv2.FeatureDetector_create and cv2.GridAdaptedFeatureDetector only)?

For example if I have c++ code I just can look in header files to understand which functions I can use, but I don't know how to do this in python bindings.

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Please rephrase your question. It's difficult to tell what is being asked here. Make some clear statements, and use proper punctuation.

sammy gravatar imagesammy ( 2012-08-21 02:03:59 -0600 )edit

Documentation at says which functions are C++ or Python. The problem is the site has been down for me for several days.

Rui Marques gravatar imageRui Marques ( 2012-08-21 05:51:54 -0600 )edit

for example if we go to there is only 1 line about python, where is another infromation?

mrgloom gravatar imagemrgloom ( 2012-08-21 06:30:33 -0600 )edit

OpenCV python bindings are not complete nor fully documented. If you need a specific functionality which is not yet available, you can use C++ or write your own bindings/docs and contribute them to OpenCV. After all, this is why OpenCV is opensource - everyone can contribute. You can also help development by donating at

sammy gravatar imagesammy ( 2012-08-21 07:45:27 -0600 )edit

Also I found documentation to opencv 2.1. But I still don't understand how to find functions that are already exist in python bindings. It seems the only way is to have a deeper look at source of python module.

mrgloom gravatar imagemrgloom ( 2012-08-22 02:03:59 -0600 )edit

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answered 2013-04-11 04:55:22 -0600

berak gravatar image

updated 2013-04-11 04:57:30 -0600

  1. start the local pydoc server:

    python/lib/ -p 1234

  2. open a browser window at localhost:1234

  3. look for cv2 in lib or lib/site-packages

it won't give you the maths or an explanation how to, but at least the function signatures and the flags are there

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answered 2013-04-10 23:19:49 -0600

cb20130410 gravatar image

I use dir(cv) or dir(cv2) after importing them. Anyone has a better solution since the documentation is incomplete?

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Asked: 2012-08-21 01:25:32 -0600

Seen: 1,736 times

Last updated: Apr 11 '13