【OpenCV】安裝在Mac及XCode筆記

要安裝openCV前，你需要先具備幾個工具
1. 已安裝command line tool 的 XCode：我的版本是6.4
2. 去官網下載最新openCV for Mac：我的是3.0.0


Step 1. 開啟你的terminal, 安裝homebrew

?

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

Step 2. 安裝cmake

?

1	brew install cmake

Step 3. cd到你解壓縮openCV後的資料夾，一一輸入下列指令

?

1 2 3 4 5

mkdir release cd release cmake -G "Unix Makefiles" .. make sudo make install

以上openCV就成功安裝囉！
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
接下來的步驟是如何用Xcode建立openCV的project (C++)


Step 4. 打開你的Xcode，用command line tool建立一個新project，建立完後會跑出build setting視窗

要改下面幾個設定(超級重要！！！)
1.  Header Search Paths ：改成/usr/local/include
2. Library Search Paths ： 改成/usr/local/lib

Step 5. Add files
到你的project旁按右鍵，會出現 "Add files to ..."

點進去按 command+shift+g 輸入 /usr/local/lib，把裡面的library全部選起來按add

以上project設定完成
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
接下來是測試

Test

我拿openCV的sample code 來測試，應該可以在openCV的資料夾下/samples/cpp/tutorial_code/introduction/display_image下找到
路徑自己改一下

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

//! [includes] #include < opencv2/core/core.hpp> #include < opencv2/imgcodecs.hpp> #include < opencv2/highgui/highgui.hpp>    #include < iostream> #include < string> //! [includes] //! [namespace] using namespace cv; //! [namespace] using namespace std; int main( int argc, char** argv ) {     //! [load]     string imageName("隨便一個圖片路徑"); // by default     if( argc > 1)     {         imageName = argv[1];     }     //! [load]           //! [mat]     Mat image;     //! [mat]           //! [imread]     image = imread(imageName.c_str(), IMREAD_COLOR); // Read the file     //! [imread]           if( image.empty() )                      // Check for invalid input     {         cout <<  "Could not open or find the image" << std::endl ;         return -1;     }           //! [window]     namedWindow( "Display window", WINDOW_AUTOSIZE ); // Create a window for display.     //! [window]           //! [imshow]     imshow( "Display window", image );                // Show our image inside it.     //! [imshow]           //! [wait]     waitKey(0); // Wait for a keystroke in the window     //! [wait]     return 0; }

成功跑出圖片就ok囉！