在 OSX 中为 python3 安装 opencv3

Question

所以我关注了this tutorial，得到了这个错误：

brew link --overwrite eigen
brew install opencv3 --with-python3 --with-contrib

在~/.profile 中写了这篇文章并获取了它：

export PYTHONPATH=$PYTHONPATH:/usr/local/Cellar/opencv3/3.0.0/lib/python3.4/site-packages
source ~/.profile
python3
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 00:54:21) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'cv2'

谁能指导我哪里出了问题以及如何解决？

更新：

我也试过这个：

Monas-MacBook-Pro:build mona$ brew ln --force opencv3
Linking /usr/local/Cellar/opencv3/3.1.0_3... 
Error: Could not symlink bin/opencv_annotation
Target /usr/local/bin/opencv_annotation
is a symlink belonging to opencv. You can unlink it:
  brew unlink opencv

To force the link and overwrite all conflicting files:
  brew link --overwrite opencv3

To list all files that would be deleted:
  brew link --overwrite --dry-run opencv3
Monas-MacBook-Pro:build mona$ brew link --overwrite opencv3
Warning: opencv3 is keg-only and must be linked with --force
Note that doing so can interfere with building software.
Monas-MacBook-Pro:build mona$ brew link --force --overwrite opencv3
Linking /usr/local/Cellar/opencv3/3.1.0_3... 551 symlinks created

Answer 1

由于您使用 Homebrew 安装 OpenCV3，您的符号链接可能已损坏。

由于 homebrew/science 中 OpenCV 的当前版本是 3.1.0，您的符号链接可能应该指向

/usr/local/Cellar/opencv3/3.1.0_3/lib/python3.5/site-packages

3.1.0_3 和 python3.5 在您的系统上可能会有所不同，因此请自行查看 /usr/local/Cellar 中的目录。

顺便说一句，我做完之后不需要链接任何东西

brew ln --force opencv3

Answer 2

您需要将您的 opencv 链接到 python 站点包

使用ln -s [cellar-opencv-site-packages-path] [lib-python-site-packages-path]链接cv.py和cv2.so

ln -s /usr/local/Cellar/opencv3/3.1.0_3/lib/python3.4.1/site-packages/cv.py /usr/local/lib/python3.4.1/site-packages/cv.py

ln -s /usr/local/Cellar/opencv3/3.1.0_3/lib/python3.4.1/site-packages/cv2.so /usr/local/lib/python3.4.1/site-packages/cv2.so

路径将基于 opencv 和 python 版本。

在这里 - [opencv3/3.1.0_3] 和 [python3.4.1]

---

简而言之，将 cv.py 和 cv2.so 从 /usr/local/Cellar/opencv3/[[version]]/lib/python[[version]]/site-packages/ 复制/链接到 /usr/local/lib/python[[version]]/site-packages/

---

或者您也可以将 opencv 站点包添加到 PYTHONPATH

export PYTHONPATH=$PYTHONPATH:/usr/local/Cellar/opencv3/3.1.0_3/lib/python3.4.1/site-packages/

source ~/.profile