OpenCV程序不会编译(全集)

Question

我正试图在Ubuntu泉塔尔中使用OpenCV编写一个简单的程序。我已经安装了所有可用的OpenCV包。我的代码如下

#include <stdio.h>
#include <highgui.h>
#include <cv.h>

int main(int argc, char *argv[]) {
        IplImage* img=0; /* pointer to an image */
        printf("Hello\n");
        if(argv[1] != 0)
                img = cvLoadImage(argv[1], 0); // 1 for color
        else
                printf("Enter filename\n");
        if(img != 0) {
                cvNamedWindow("Display", CV_WINDOW_AUTOSIZE); // create a window
                cvShowImage("Display", img); // show image in window
                cvWaitKey(0); // wait until user hits a key
                cvDestroyWindow("Display");
        }
        else
                printf("File not found\n");
        return 0;
}

我的编译命令是g++ -I/usr/include/opencv -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_flann main.cpp -o main

我得到以下错误

/tmp/ccUQ4Tm4.o: In function `main':
main.cpp:(.text+0x45): undefined reference to `cvLoadImage'
main.cpp:(.text+0x6b): undefined reference to `cvNamedWindow'
main.cpp:(.text+0x7c): undefined reference to `cvShowImage'
main.cpp:(.text+0x86): undefined reference to `cvWaitKey'
main.cpp:(.text+0x90): undefined reference to `cvDestroyWindow'
collect2: ld returned 1 exit status
make: *** [all] Error 1

我从上面的错误中了解到，找到库是没有问题的，但是编译器找不到它里面的函数。你能帮帮我吗？

Answer 1

最后包括你所有的库。

例如：

g++ -I/usr/include/opencv main.cpp -o main -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_flann  

它解析符号，因为它发现库的顺序与它写在命令行上的顺序相同。