Error cv::SURF::SURF(double,int,int,bool,bool) in Implementation SURF with OpenCV and C++

Question

Possible duplicate of OpenCV SURF function is not implemented

My Error code is:

error LNK2019: unresolved external symbol "public: __thiscall cv::SURF::SURF(double,int,int,bool,bool)" (??0SURF@cv@@QAE@NHH_N0@Z) referenced in function _main

I don't know how to fix it.

My Code is:

#include <opencv\cv.h>
#include <opencv\highgui.h>
#include <iostream>
#include <conio.h>
#include <opencv2\nonfree\features2d.hpp>
#include <opencv2\legacy\legacy.hpp>
#include <opencv2\core\core.hpp>
#include <stdio.h>

using namespace cv;
using namespace std;

int main()
{
    Mat img_1 = imread("kmu1.jpg", CV_LOAD_IMAGE_GRAYSCALE);
    Mat img_2 = imread("all.jpg", CV_LOAD_IMAGE_GRAYSCALE);

    if(!img_1.data || !img_2.data)
    {
        cout << "could not open or find the image" << endl;
        return -1;
    }

    int minHessian = 400;
    SURF surf( minHessian );

    vector <KeyPoint> keyPoints_1, keyPoints_2;
    Mat descriptors_1, descriptors_2;

    surf(img_1, Mat(), keyPoints_1, descriptors_1, false);
    surf(img_2, Mat(), keyPoints_2, descriptors_2, false);

    BFMatcher matcher(NORM_L2, false);
    vector<DMatch> matches;
    matcher.match(descriptors_1, descriptors_2, matches);

    Mat img_matches;
    drawMatches(img_1, keyPoints_1, img_2, keyPoints_2, matches, img_matches);

    imshow("Matches", img_matches);

    waitKey(0);
    _getch();
    return 0;
} 

Answer 1

Try to add those libs if you are in Debug mode and using OpenCV 2.4.5:

opencv_nonfree245d.lib 
opencv_features2d245d.lib

In Project -> Properties -> linker -> Input -> Additional Dependencies.

I had the same error doing Feature Description tutorial and it fixed it.