macOS Sierra上Opencv的安装与使用

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安装cmake  brew install cmake    安装OpenCV   brew install opencv  //opencv升级  # brew upgrade opencv    配置OpenCV环境: vi /etc/profile添加            PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/Cellar/opencv/3.4.1_2/lib/pkgconfig   export PKG_CONFIG_PATH    export LD_LIBRARY_PATH=/usr/local/Cellar/opencv/3.4.1_2/bin:SLD_LIBRARY_PATH    export PATH=${PATH}:/usr/local/Cellar/opencv/3.4.1_2/lib   执行:source /etc/profile  重启电脑      4.测试demo  <1>.test.cpp     #include <opencv2/highgui.hpp>  #include <opencv2/opencv.hpp>      using namespace cv;      int main(int argc, char** argv)  {       //加载图片路径    Mat img = imread("moon.jpeg", CV_LOAD_IMAGE_UNCHANGED);        if(img.empty())    {      fprintf(stderr, "请输入正确的图片路径\n");      return -1;    }        Mat gray;    cvtColor(img,gray,CV_BGR2GRAY);          //jpeg格式转换为png格式图片    if( ! imwrite("image_copy.png", img) )    {      fprintf(stderr, "转换写入图片失败.\n");    }        imshow("显示图片", img);    waitKey(0);        return 0;  }      <2>.Makefile 注意：第2行和第4行开头是 Tab键，不是空格键。  test:test.cpp      g++ -o test test.cpp `pkg-config --libs opencv` `pkg-config --cflags opencv`       clean:      rm test