如何在MacOS上使用OpenCV連接C++程序

我是openCV的新手。
我剛剛從Github下載了openCV的源代碼，並將它安裝在桌面上（Mac OS）。
如何在MacOS上使用OpenCV連接C++程序

現在我需要將二進制文件轉換爲圖像文件。下面是代碼：

// The program is first to convert the image to the binary file then convert the binary file back to the image 
#include <iostream> 
#include </Users/Me/Desktop/opencv-master/include/opencv2/opencv.hpp> 
#include </Users/Me/Desktop/opencv-master/modules/highgui/include/opencv2/highgui.hpp> 

const std::string filename = "test.dat"; 
const std::string picname = "pano_b.jpg"; 

int main(int argc, char **argv) 
{ 
    std::ofstream outfile; 
    outfile.open(filename.c_str(), std::ios::binary); 
    if (!outfile) 
    { 
     std::cerr << "failed to open the file : " << filename << std::endl; 
     return -1; 
    } 
    cv::Mat srcImg = cv::imread(picname); 
    if (srcImg.empty()) 
    { 
     std::cerr << "failed to open the file : " << picname << std::endl; 
     return -1; 
    } 
    for (int r = 0; r < srcImg.rows; r++) 
     outfile.write(reinterpret_cast<const char*>(srcImg.ptr(r)), srcImg.cols*srcImg.elemSize()); 
    std::cout << "write to file ok!" << std::endl; 

    ///// Here the file test.dat is generated. It looks like this: 
    ///// 0069 a800 6caa 0074 af0c 80b9 2096 ca2a 
    ///// 9fd2 1c8d bf03 71a1 0773 a300 6295 0064 
    ///// 9907 73a9 0070 a900 6da8 0480 bc18 95d2 
    ///// ... 



    //////// Now I want to convert test.dat into an image file 

    cv::Mat img = cv::imread(filename.c_str(), cv::IMREAD_ANYCOLOR); 
    cv::imshow("img", img); 
    cv::waitKey(); 

    return 0; 
}

不過，我得到了一個錯誤如下：

Undefined symbols for architecture x86_64: "cv::imshow(cv::String const&, cv::_InputArray const&)", referenced from: _main in bbb-bb77f0.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

正如我所說的，我在桌面上安裝OpenCV的，這是我如何編譯：

g++ test.cpp /Users/Me/Desktop/opencv-master/build/lib/libopencv_core.dylib /Users/Me/Desktop/opencv-master/build/lib/libopencv_imgproc.dylib /Users/Me/Desktop/opencv-master/build/lib/libopencv_imgcodecs.dylib

這裏是我在openCV目錄中找到的所有lib文件：

我應該怎麼做才能解決這個鏈接錯誤？

來源

2017-08-09 Yves

要使用imread，您需要文件中的圖像標題。如果您想手動讀取二進制文件並從中構建圖像，則必須知道原始數據的寬度，高度和像素類型。 – Micka

@Micka你能舉個例子嗎？ – Yves

錯誤表示找不到imshow，這是highgui。從你提供的內容來看，你還需要鏈接libopencv_highgui.dylib。例如：

g++ test.cpp /Users/Me/Desktop/opencv-master/build/lib/libopencv_core.dylib \ 
      /Users/Me/Desktop/opencv-master/build/lib/libopencv_imgproc.dylib \ 
      /Users/Me/Desktop/opencv-master/build/lib/libopencv_imgcodecs.dylib \ 
      /Users/Me/Desktop/opencv-master/build/lib/libopencv_highgui.dylib

另一方面說明，我建議使用cmake自動鏈接所有的OpenCV庫。你可以找到一個CMakeList.txt示例here。

來源

2017-08-09 07:45:43

如何在MacOS上使用OpenCV連接C++程序

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