Mac OS X下使用C++ opencv库

1. 若未安装cmake，使用命令brew install cmake安装。

若未安装pkg-config，使用命令brew install pkg-config安装。若安装后未能找到pkg-config程序，则将其复制到/usr/local/bin目录下。

2. 安装opencv

brew install opencv

3. 测试程序

#include <iostream>
#include <opencv2/opencv.hpp>
#include <vector>
#include <string>
using namespace std;
using namespace cv;

int main()
{
    cv::Mat img_encode;
    img_encode = imread("./obito.jpeg", CV_LOAD_IMAGE_COLOR);
    vector<uchar> data_encode;
    imencode(".jpeg", img_encode, data_encode);
    string str_encode(data_encode.begin(), data_encode.end());
    //cout << str_encode << endl;

    cv::Mat img_decode;
    vector<uchar> data(str_encode.begin(), str_encode.end());
    img_decode = imdecode(data, CV_LOAD_IMAGE_COLOR);
    imshow("pic", img_decode);
    cvWaitKey(10000);
    
    
    //cout << "Hello" << endl;
}

编译命令为：g++ Cpp_Opencv.cpp -o Cpp_Opencv `pkg-config --cflags --libs opencv`

或者直接将链接库列出来：g++ Cpp_Opencv.cpp  -L/usr/local/lib/ -lopencv_highgui.3.4.2 -lopencv_core.3.4.2 -lopencv_imgcodecs