I am trying to compile a simple program using OpenCV in Ubuntu Quantal. I have installed all the OpenCV packages available. My code is the following
#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;
}
And my compile command is 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
And I get the following errors
/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
What I understand from the errors above is that there is no problem finding the library but the compiler cannot find the functions inside it. Can you please help me out with that?