mac install python opencv module

1.下载Homebrew  在Terminal中输入：

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

2.安装cmake       在Terminal中输入：

brew install cmake

开始安装opneCV

3.安装openCV     在Terminal中输入：

brew install opencv

如果出现 

Error: No available formula for opencv 

在输入brew install opencv前  先输入

brew tap homebrew/science