I compiled the python bindings for latest version and found the package name is still cv2:
>>> import cv3
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named cv3
>>> import cv2
>>> cv2.__version__
'3.0.0'
Is the package name going to be updated to cv3?
@wuling HAHA this is really the funniest explanation I have read around here.
@hoju, actually the 2 does not refer to the version number of OpenCV. Basically it is the difference between the underlying C API, which is denoted by the cv prefix and the C++ API which is denoted by the cv2 prefix. This is mainly a historical matter and it is kept to keep backwards compatibility. It also allows you to combine the C and C++ interface if you really need it, but which is discouraged a lot!
@Guanta, that is because they want to kick out the C-API and replace it in the near future by auto generated C-wrappers based on numl, a functional language able to create vectorized C code as seen in the CVPR presentation of last sunday.
The easiest way is to use the 2.4.11 documentation. You search based on the C function and it will show you the equivalent C++ option. For python that is cv and cv2.
@StevenPuttemans can you provide a link to this numl language? I can't seem to find anything like that, except for numl.net, which I guess is probably not what you meant.
I did not yet found a page explaining it. I only read it in a the OpenCV CVPR2015 presentation.
Asked: 2015-06-06 23:40:11 -0600
Seen: 33,512 times
Last updated: Jun 07 '15
I guess, cv2 means cv "convert to" ,it's not version.:)