这段代码很简单,基本上是从此教程中直接提取的。我正在运行Arch Linux,并且已经将OpenCV库存储在/usr/include/
中。我还检查过确保/usr/include
在我的PATH路径中。
#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <iostream>
using namespace cv;
int main(int argc, char** argv){
Mat image;
Mat grayImage;
if(!argv[1]){
std::cerr << "No image data!" << std::endl;
return -1;
}
image = imread(argv[1], 1);
cvtColor(image, grayImage, CV_BGR2GRAY);
imwrite("Gray_Image.jpg", grayImage);
namedWindow(argv[1], CV_WINDOW_AUTOSIZE);
namedWindow("Gray Image", CV_WINDOW_AUTOSIZE);
imshow(argv[1], image);
imshow("Gray Image", grayImage);
waitKey(0);
return 0;
}
编译器进程成功找到并包含这些头文件,但我仍然会在编译时收到未定义的引用错误。如果您查看我所包含的头文件,它们还会在/usr/include/opencv2
中包含其他文件。我已经检查过,这样的头文件确实存在。
有任何想法吗?
/tmp/ccudBcqD.o: In function `main':
test.cpp:(.text+0xc0): undefined reference to `cv::imread(std::string const&, int)'
test.cpp:(.text+0x11f): undefined reference to `cv::_OutputArray::_OutputArray(cv::Mat&)'
test.cpp:(.text+0x138): undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
test.cpp:(.text+0x158): undefined reference to `cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int)'
test.cpp:(.text+0x180): undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
test.cpp:(.text+0x1ca): undefined reference to `cv::imwrite(std::string const&, cv::_InputArray const&, std::vector<int, std::allocator<int> > const&)'
test.cpp:(.text+0x241): undefined reference to `cv::namedWindow(std::string const&, int)'
test.cpp:(.text+0x291): undefined reference to `cv::namedWindow(std::string const&, int)'
test.cpp:(.text+0x2bf): undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
test.cpp:(.text+0x2ff): undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
test.cpp:(.text+0x32d): undefined reference to `cv::_InputArray::_InputArray(cv::Mat const&)'
test.cpp:(.text+0x361): undefined reference to `cv::imshow(std::string const&, cv::_InputArray const&)'
test.cpp:(.text+0x383): undefined reference to `cv::waitKey(int)'
/tmp/ccudBcqD.o: In function `cv::Mat::~Mat()':
test.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x39): undefined reference to `cv::fastFree(void*)'
/tmp/ccudBcqD.o: In function `cv::Mat::operator=(cv::Mat const&)':
test.cpp:(.text._ZN2cv3MataSERKS0_[_ZN2cv3MataSERKS0_]+0x111): undefined reference to `cv::Mat::copySize(cv::Mat const&)'
/tmp/ccudBcqD.o: In function `cv::Mat::release()':
test.cpp:(.text._ZN2cv3Mat7releaseEv[_ZN2cv3Mat7releaseEv]+0x47): undefined reference to `cv::Mat::deallocate()'
collect2: error: ld returned 1 exit status
[Finished in 1.1s with exit code 1]
[shell_cmd: g++ "/home/branden/Desktop/OpenCV/test.cpp" -o "/home/branden/Desktop/OpenCV/test"]
[dir: /home/branden/Desktop/OpenCV]
[path: /usr/local/sbin:/usr/local/bin:/usr/bin:/usr/bin/vendor_perl:/usr/bin/core_perl]
pkg-config --cflags --libs opencv
?这究竟是做什么的? - sherrellbcg++ file.cpp -o file
,而正确的方式应该是g++ pkg-config --cflags --libs opencv file.cpp -o file
。 - sherrellbc-lopencv_dnn345 -lopencv_ml345 ...
。 - rogerdpack