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OpenCV 程序无法编译（Quantal）

tag-icon • tag-icon 12.10 compiling c++ make opencv
OpenCV 程序无法编译（Quantal）

我正在尝试使用 Ubuntu Quantal 中的 OpenCV 编译一个简单的程序。我已经安装了所有可用的 OpenCV 软件包。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

我收到以下错误

/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

我从上述错误中了解到，找到库没有问题，但编译器找不到其中的函数。你能帮我解决这个问题吗？

答案1

最后包含所有库。

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

它会解析符号，因为它按照在命令行上写入的相同顺序找到库。

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