Error with createBackgroundSubtractor with OpenCV 3.1 and extra module contrib
Hello !
I just installed opencv 3.1, and I wanted to use the function createBackgroundSubtractorMOG. I saw on this post that it was moved to an extra module, so I installed it ( post : http://answers.opencv.org/question/88... ), but I still have a problem.
Indeed when I compile, I have the following error :
"error: ‘createBackgroundSubtractorMOG’ was not declared in this scope"
And when I try to write : bgsegm::createBackgroundSubtractorMOG
, I got : undefined reference tocv::bgsegm::createBackgroundSubtractorMOG(int, int, double, double)
If someone has a idea why I still can't use this function, that would be very helpful !
Here is the code (it is actually the code from http://docs.opencv.org/3.1.0/d1/dc5/t... , where I changed MOG2 to MOG)
Thank you very much !
Florence
//opencv
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/videoio.hpp"
#include <opencv2/highgui.hpp>
#include <opencv2/video.hpp>
#include <opencv2/core/ocl.hpp>
#include <opencv2/bgsegm.hpp>
#include <opencv2/core.hpp>
//C
#include <stdio.h>
//C++
#include <iostream>
#include <sstream>
using namespace cv;
using namespace std;
// Global variables
Mat frame; //current frame
Mat fgMaskMOG; //fg mask fg mask generated by MOG method
Ptr<BackgroundSubtractor> pMOG; //MOG Background subtractor
int keyboard; //input from keyboard
void help();
void processVideo(char* videoFilename);
void processImages(char* firstFrameFilename);
void help()
{
cout
<< "--------------------------------------------------------------------------" << endl
<< "This program shows how to use background subtraction methods provided by " << endl
<< " OpenCV. You can process both videos (-vid) and images (-img)." << endl
<< endl
<< "Usage:" << endl
<< "./bs {-vid <video filename>|-img <image filename>}" << endl
<< "for example: ./bs -vid video.avi" << endl
<< "or: ./bs -img /data/images/1.png" << endl
<< "--------------------------------------------------------------------------" << endl
<< endl;
}
int main(int argc, char* argv[])
{
//print help information
help();
// desactivate the parallelism on the gpu
cv::ocl::setUseOpenCL(false);
//check for the input parameter correctness
if(argc != 3) {
cerr <<"Incorret input list" << endl;
cerr <<"exiting..." << endl;
return EXIT_FAILURE;
}
//create GUI windows
namedWindow("Frame");
namedWindow("FG Mask MOG 2");
//create Background Subtractor objects
pMOG = createBackgroundSubtractorMOG(); //MOG approach
if(strcmp(argv[1], "-vid") == 0) {
//input data coming from a video
processVideo(argv[2]);
}
else if(strcmp(argv[1], "-img") == 0) {
//input data coming from a sequence of images
processImages(argv[2]);
}
else {
//error in reading input parameters
cerr <<"Please, check the input parameters." << endl;
cerr <<"Exiting..." << endl;
return EXIT_FAILURE;
}
//destroy GUI windows
destroyAllWindows();
return EXIT_SUCCESS;
}
void processVideo(char* videoFilename) {
//create the capture object
VideoCapture capture(videoFilename);
if(!capture.isOpened()){
//error in opening the video input
cerr << "Unable to open video file: " << videoFilename << endl;
exit(EXIT_FAILURE);
}
//read input data. ESC or 'q' for quitting
while( (char)keyboard != 'q' && (char)keyboard != 27 ){
//read the current frame
if(!capture.read(frame)) {
cerr << "Unable to read next frame." << endl;
cerr << "Exiting..." << endl;
exit(EXIT_FAILURE);
}
//update the background model
pMOG->apply(frame, fgMaskMOG,1);
//get the frame number and write it on the current frame
stringstream ss;
rectangle(frame, cv::Point(10, 2), cv::Point(100,20),
cv::Scalar(255,255,255), -1);
ss << capture.get(CAP_PROP_POS_FRAMES);
string frameNumberString = ss.str();
putText(frame, frameNumberString ...