Mac上编译安装 opencv和opencv_contrib

Mac上编译安装 opencv和opencv_contrib

下载源代码

github源代码地址：
opencv
opencv_contrib
这两个项目我放在同一级目录下。目录分别为：

/Users/zhangxin/github/opencv
/Users/zhangxin/github/opencv_contrib

编译

先进入到opencv目录下，依次执行以下操作

mkdir release
cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=/usr/local \
      -D INSTALL_PYTHON_EXAMPLES=ON \
      -D INSTALL_C_EXAMPLES=OFF \
      -D OPENCV_EXTRA_MODULES_PATH=/Users/zhangxin/github/opencv_contrib/modules \
      -D BUILD_EXAMPLES=ON \
      -D BUILD_opencv_legacy=OFF \
      -DWITH_IPP=OFF \
      ..

make
sudo make install

* 注意要写绝对路径 *

问题

问题 1

error: unknown type name ‘constexpr’

/usr/local/include/tesseract/publictypes.h:33:1: error: unknown type name 'constexpr'

解决方法：

sudo vim /usr/local/include/tesseract/publictypes.h
//add this line
#define constexpr const

问题2

RuntimeError: module compiled against API version 0xa but this version of numpy is 0x9

RuntimeError: module compiled against API version 0xa but this version of numpy is 0x9
Traceback (most recent call last):
  File "feature_matching.py", line 2, in <module>
    import cv2
  File "/Users/zhangxin/Library/Python/2.7/lib/python/site-packages/cv2/__init__.py", line 9, in <module>
    from .cv2 import *
ImportError: numpy.core.multiarray failed to import

解决方法:不使用mac上默认的python，而是用brew安装的python

alias python='/usr/local/Cellar/python/2.7.13/bin/python'

问题3

下载ipp库慢 ，可以加入-DWITH_IPP=OFF，不再使用ipp。

参考资料

Installation in Linux
opencv/opencv_contrib