为什么即使安装了软件包也无法导入opencv3？

Question

I currently am running Python 3.5 and using Spyder from Anaconda as my IDE. I am running this on a Windows machine.

When I write import cv3 at the top of my code, it returns the error ImportError: No module named 'cv3'

I attempted to install opencv3 again with the command conda install -c https://conda.binstar.org/menpo opencv3 in the Command Prompt. It is apparently already installed because it returned

Fetching package metabase...............
Solving package specifications: .
# All requested packages already installed.
# packages in environment at C:\Users\Joey\Anaconda3:
# opencv3       3.1.0       py35_0      https://conda.binstar.org/menpo

Am I importing cv3 wrong? How do I fix this error?

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Tried import cv3 instead of import cv2 but got the following error: ImportError: cannot import name 'cv2' . The wording on the two errors is different, so python must acknowledge there is opencv installed but it does not work for some reason. Any ideas?

Answer 1

具有讽刺意味的是，该模块仍然被称为cv2因为它不代表opencv的版本，而是下面的实际C ++ API，与C API形成对比，命名为 - cv2 ...所以试试： import cv2

Answer 2

Problem solved by using command pip uninstall opencv-python in the Command Prompt.

I have attempted several installations of opencv and I suppose one may have downloaded badly and Anaconda was attempting to read that one. I looked into the build of some of the other installations I attempted and some were for Python 2.7. Maybe that contributed to the error.

Thankfully, this worked. Now import cv2 works perfectly. No errors.

Answer 3

I used the same approach to install the package. However, I could not import the library using the name opencv3 . I had to use cv2 which worked for me.

Answer 4

Elaborating on @zwer's answer, check the version of OpenCV after import cv2 .

>>> cv2.__version__
'3.1.0'

So basically it's calling the OpenCV3 library.