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我写了一个像这样的简单程序

#include <opencv2/opencv.hpp>

using namespace cv;

int main(int argc, const char* argv[])
{
    Mat input = imread(argv[1], 0); //Load as grayscale
    //~ FAST detector;
    //~ vector<KeyPoint> keypoints;
    //~ FAST(input, keypoints, 0.2);

    // Add results to image and save.
    //~ Mat output;
    //~ drawKeypoints(input, keypoints, output);
    namedWindow ("Image", CV_WINDOW_FREERATIO);
    imshow("Image", input);
    //~ imwrite(argv[2], output);

    return 0;
}

然后像这样编译程序:

g++ `pkg-config --libs opencv` main.cpp

这是输出g++

/tmp/ccK1Sbrw.o: In function `main':
main.cpp:(.text+0x66): undefined reference to `cv::imread(std::string const&, int)'
main.cpp:(.text+0xc2): undefined reference to `cv::namedWindow(std::string const&, int)'
main.cpp:(.text+0xf6): undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
main.cpp:(.text+0x139): undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
/tmp/ccK1Sbrw.o: In function `cv::Mat::~Mat()':
main.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x39): undefined reference to `cv::fastFree(void*)'
/tmp/ccK1Sbrw.o: In function `cv::Mat::release()':
main.cpp:(.text._ZN2cv3Mat7releaseEv[_ZN2cv3Mat7releaseEv]+0x47): undefined reference to `cv::Mat::deallocate()'
collect2: error: ld returned 1 exit status

我已经安装了库,我可以在它们的文件夹中看到 *.so 和 *.hpp 文件,并ld找到它们,但它抱怨什么?.so 文件中没有任何内容?!

另外,我没有安装非自由模块(我曾经apt-get安装过 opencv),我怎样才能得到它们?我需要该模块内的 SIFT。我必须自己编译opencv吗?

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1 回答 1

1

在我看来,您忘记在

`pkg-config --libs MODULENAMEGOESHERE`
于 2013-10-10T11:58:38.583 回答