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compile time errors in openCV/C++ code.

asked 2015-03-27 12:50:21 -0500

namiqaliyev gravatar image

I have a openCV & c++ code like below.

#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

using namespace std;
using namespace cv;

int main(int argc, const char *argv[])
{
    Mat res(720,502,CV_8UC3,Scalar(0,255,255));
    vector<int> sparam;
    sparam.push_back(CV_IMWRITE_JPEG_QUALITY);
    sparam.push_back(80);
    imwrite("/home/namiq/Pictures/IMG.JPG",res,sparam);
    namedWindow("Open Picture",CV_WINDOW_AUTOSIZE);
    imshow("Open Picture",res);
    waitKey(0);
    destroyWindow("Open Picture");
    return 0;
}

When I do g++ openpic.cpp -lopencv_core -lopencv_highgui for compile, it gives an error

/usr/bin/ld: /tmp/ccYxhFYr.o: undefined reference to symbol '_ZN2cv7imwriteERKNS_6StringERKNS_11_InputArrayERKSt6vectorIiSaIiEE'
//usr/local/lib/libopencv_imgcodecs.so.3.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

What is the problem. I am new in OPENCV, and I get many errors in c++...

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Comments

3

if you really are using opencv3.0, you additionally need -lopencv_imgcodecs , like your error says.

berak gravatar imageberak ( 2015-03-27 12:56:16 -0500 )edit

But it does not show the picture.....

namiqaliyev gravatar imagenamiqaliyev ( 2015-03-27 13:05:34 -0500 )edit

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answered 2015-07-21 20:09:26 -0500

zhoutianyou gravatar image

If you really are using opencv3.0 , you additionally need -lopencv_videoio -lopencv_imgcodecs -lopencv_video, like your error says;

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answered 2015-03-28 02:55:51 -0500

judu29hbc gravatar image

It doesn't show it because it is going too fast so you can see it. Just put something like 10000 in wait key function

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boaz001 gravatar imageboaz001 ( 2015-03-28 17:44:53 -0500 )edit
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Asked: 2015-03-27 12:50:21 -0500

Seen: 2,288 times

Last updated: Mar 28 '15