I new user of openCV and I am having troubles.
I am using 'codeblocks-13.12mingw-setup.exe', opencv 3.0rc1 and window 7 64 bits.
My steps until now was:
- to extract the opencv to c:\opencv
- to define the environment variables OPENCV_DIR and to add Path=%OPENCV_DIR%\bin;C:\Program Files (x86)\CodeBlocks\MinGW\bin;
- I downloaded pkg-config and copied it to MinGW\bin directory
Now when I compile, the code below, everything works fine:
#include
#include
int main()
{
std::cout << "OpenCV Version: " << CV_VERSION << std::endl;
return 0;
}
But, whe I compile this one:
#include
#include "opencv2/core.hpp"
int main() {
cv::Mat A(1000,1000,CV_64F);
return 0; }
I receive this result:
> C:\Users\user\Documents\CodeBlock\opencv02.o:opencv02.cpp:(.text$_ZN2cv3MatD1Ev[__ZN2cv3MatD1Ev]+0x2d)||undefined> reference to `cv::fastFree(void*)'|> C:\Users\user\Documents\CodeBlock\opencv02.o:opencv02.cpp:(.text$_ZN2cv3Mat6createEiii[__ZN2cv3Mat6createEiii]+0xb1)||undefined> reference to `cv::Mat::create(int, int> const*, int)'|> C:\Users\user\Documents\CodeBlock\opencv02.o:opencv02.cpp:(.text$_ZN2cv3Mat7releaseEv[__ZN2cv3Mat7releaseEv]+0x30)||undefined reference to `__atomic_fetch_add_4'|> C:\Users\user\Documents\CodeBlock\opencv02.o:opencv02.cpp:(.text$_ZN2cv3Mat7releaseEv[__ZN2cv3Mat7releaseEv]+0x49)||undefined reference to `cv::Mat::deallocate()'|> ||=== Build failed: 4 error(s), 0> warning(s) (0 minute(s), 1 second(s))> ===|
or this one:
#include
#include
#include
using namespace cv;
using namespace std;
int main()
{
Mat image;
image = imread("imagem.jpg", CV_LOAD_IMAGE_COLOR);
if(! image.data )
{
cout << "Could not open or find the image" << std::endl ;
return -1;
}
namedWindow( "Display window", WINDOW_AUTOSIZE );
imshow( "Display window", image );
waitKey(0);
return 0;
}
I receive:
> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp||> undefined reference to> `cv::imread(cv::String const&, int)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp||> undefined reference to> `cv::namedWindow(cv::String const&,> int)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp||> undefined reference to> `cv::imshow(cv::String const&,> cv::_InputArray const&)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp||> undefined reference to> `cv::waitKey(int)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp:(.text$_ZN2cv6StringC1EPKc[__ZN2cv6StringC1EPKc]+0x3c)||undefined reference to> `cv::String::allocate(unsigned int)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp:(.text$_ZN2cv6StringD1Ev[__ZN2cv6StringD1Ev]+0xf)||undefined> reference to> `cv::String::deallocate()'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp:(.text$_ZN2cv3MatD1Ev[__ZN2cv3MatD1Ev]+0x2d)||undefined> reference to `cv::fastFree(void*)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp:(.text$_ZN2cv3MataSERKS0_[__ZN2cv3MataSERKS0_]+0xf8)||undefined> reference to> `cv::Mat::copySize(cv::Mat const&)'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp:(.text$_ZN2cv3Mat7releaseEv[__ZN2cv3Mat7releaseEv]+0x30)||undefined reference to `__atomic_fetch_add_4'|> C:\Users\user\Documents\CodeBlock\opencv03.o:opencv03.cpp:(.text$_ZN2cv3Mat7releaseEv[__ZN2cv3Mat7releaseEv]+0x49)||undefined reference to `cv::Mat::deallocate()'|> ||=== Build failed: 10 error(s), 0> warning(s) (0 minute(s), 0 second(s))> ===|
I already tried to add "pkg-config --cfalgs --libs opencv" to Settings->Compiler->Linker Settings->Other Linker Options, but it does not worked. In this case I receive this message:
pkg-config||No such file or directory|
opencv||No such file or directory|
|=== Build failed: 2 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
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