mac上安装opencv以及Xcode上opencv+ c++环境配置

今天药忘吃喽~ 2021-10-18 06:38 843阅读 0赞

### 主要步骤： ###

> 1.  GitHub官网下载OpenCV
> 2.  下载并配置CMake
> 3.  使用CMmake编译OpenCV
> 4.  使用Xcode测试OpenCV是否能够正常使用

一、下载OpenCV

官网下载：[https://github.com/opencv/opencv][https_github.com_opencv_opencv]，点击release，选择需要的版本下载压缩包

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70][]

2.我这里下载的是OpenCV3.4.6

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 1][]

二、下载CMake并配置编译opencv

1.如果还没有安装homebrew，先用命令安装homebrew

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

2.使用homebrew下载CMake

brew install cmake

3.安装好cmake后，在`/Users/your_user_name/opencv/opencv-3.4.6`新建一个文件夹，假设名字叫`build`。

4.进入文件夹build

cd build

5.利用cmake编译

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 2][]

6.完成上一步后，并行运行8个作业

make -j8

7.最后

sudo make install

所有的opencv library，就在`/Users/your_user_name/opencv/opencv-3.4.0/build/lib`中了。

三、用Xcode新建一个项目测试

1.新建一个项目

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 3][]

2.填写项目名字，语言选择c++

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 4][]

3.配置头文件和包的搜索路径

选择Build Setting ----搜索框中输入search----按回车，如下图所示

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 5][]

header search paths:配置以下两个路径

$(PROJECT_DIR)      //这个代表你当前工程路径
    /usr/local/include    //这是之前默认cmake后OpenCV头文件放置路径

library search paths:配置以下两个路径

$(PROJECT_DIR)     //这个代表你当前工程路径
    /usr/local/lib         //这是之前默认cmake后OpenCV库文件放置路径

$(PROJECT\_DIR) 是为了防止以后项目换个机子就找不到引用地址了。

4.添加lib文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 6][]

点击加号，再点击add others

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 7][]

进入 /usr/local/lib 选择图中几个文件添加，注意下，这个路径默认是不可见的，按下这几个键就可以看见了：shift+cmmand+.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 8][]

添加之后如图,如果实在不知道要添加哪些要用的，可以把所有的图标左下方没有箭头的\*opencv\*.dylib的文件都添加进去

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 9][]

5.将下面的代码覆盖默认的main.cpp，该程序将图片进行灰度处理

/Users/istars/Pictures/junxun.jpg是图片地址。

//
    //  main.cpp
    //  opencvTest
    //
    //  Created by istars on 2019/8/12.
    //  Copyright © 2019年 istars. All rights reserved.
    //
    
    #include <iostream>
    using namespace std;
    #include <opencv2/opencv.hpp>
    using namespace cv;
    
    int main(int argc, const char * argv[]) {
        // insert code here...
        std::cout << "Hello, World!\n";
        string path = "/Users/istars/Pictures/junxun.jpg";
        Mat image = imread(path);
        namedWindow("WGG");
        imshow("WGG", image);
        
        Mat gray;
        cvtColor(image, gray, COLOR_RGBA2GRAY);
        namedWindow("gray");
        imshow("gray", gray);
        waitKey(0);
        return 0;
    }

6.运行实例程序

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0YXJfb2Zfc2NpZW5jZQ_size_16_color_FFFFFF_t_70 10][]

[https_github.com_opencv_opencv]: https://github.com/opencv/opencv/archive/3.4.6.zip
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