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I've been googling it for hours and this kind of error refers to LINKER.. So I should link the aruco libraries to Linker, but there aren't .lib files in the package that I downloaded.

HI! I have a problem with Aruco Library. I downloaded Aruco from here: http://sourceforge.net/projects/aruco/ I'm on win7 x64 and I use VS2010. I wrote this simple code:

#include <iostream>
#include <stdio.h>
#include <string>   // for strings
#include <iomanip>  // for controlling float print precision
#include <sstream>  // string to number conversion
#include "C:/Users/Cristina/Desktop/OpenCV/dep/aruco/src/aruco.h"
#include "C:/Users/Cristina/Desktop/OpenCV/dep/aruco/src/cvdrawingutils.h"
#include "C:/Users/Cristina/Desktop/OpenCV/dep/aruco/src/cameraparameters.hpp"
#include "C:/Users/Cristina/Desktop/OpenCV/opencv/include/opencv/cv.h"
#include "C:/Users/Cristina/Desktop/OpenCV/opencv/include/opencv/highgui.h"
#include "C:/Users/Cristina/Desktop/OpenCV/opencv/modules/imgproc/include/opencv2/imgproc/imgproc.hpp"
#include "C:/Users/Cristina/Desktop/OpenCV/opencv/modules/highgui/include/opencv2/highgui/highgui.hpp"
#include "C:/Users/Cristina/Desktop/OpenCV/opencv/modules/core/include/opencv2/core/core.hpp"

using namespace cv;
using namespace aruco;

int main() {

    aruco::CameraParameters CamParam;
    aruco::MarkerDetector MDetector;
    vector <Marker> Markers;
    cv::Mat img;

    img = imread("prova marker", 0);

    cv::namedWindow("originale", 1);
    cv::namedWindow("risultato", 1);

    cv::Mat risultato;

    img.copyTo(risultato);

    MDetector.detect(img, Markers, CamParam, -1);

    for (int i=0; i< Markers.size(); i++) {

        Markers[i].draw(risultato, Scalar(0,0, 255));
    }

    cv::imshow("originale", img);
    cv::imshow("risultato", risultato);
    waitKey(0);

return 0;
}

But, when a click on Debug button, i receive a lot of warnings e this errors:

1>------ Inizio compilazione: Progetto: aruco marker, Configurazione: Debug Win32 ------
1>main.obj : error LNK2019: riferimento al simbolo esterno "public: __thiscall aruco::MarkerDetector::~MarkerDetector(void)" (??1MarkerDetector@aruco@@QAE@XZ) non risolto nella funzione _main
1>main.obj : error LNK2019: riferimento al simbolo esterno "public: void __thiscall aruco::Marker::draw(class cv::Mat &,class cv::Scalar_<double>,int,bool)const " (?draw@Marker@aruco@@QBEXAAVMat@cv@@V?$Scalar_@N@4@H_N@Z) non risolto nella funzione _main
1>main.obj : error LNK2019: riferimento al simbolo esterno "public: void __thiscall aruco::MarkerDetector::detect(class cv::Mat const &,class std::vector<class aruco::Marker,class std::allocator<class aruco::Marker> > &,class aruco::CameraParameters,float,bool)" (?detect@MarkerDetector@aruco@@QAEXABVMat@cv@@AAV?$vector@VMarker@aruco@@V?$allocator@VMarker@aruco@@@std@@@std@@VCameraParameters@2@M_N@Z) non risolto nella funzione _main
1>main.obj : error LNK2019: riferimento al simbolo esterno "public: __thiscall aruco::CameraParameters::CameraParameters(class aruco::CameraParameters const &)" (??0CameraParameters@aruco@@QAE@ABV01@@Z) non risolto nella funzione _main
1>main.obj : error LNK2019: riferimento al simbolo esterno "public: __thiscall aruco::MarkerDetector::MarkerDetector(void)" (??0MarkerDetector@aruco@@QAE@XZ) non risolto nella funzione _main
1>main.obj : error LNK2019: riferimento al simbolo esterno "public: __thiscall aruco::CameraParameters::CameraParameters(void)" (??0CameraParameters@aruco@@QAE@XZ) non risolto nella funzione _main
1>C:\Users\Cristina\Desktop\OpenCV\Progetti\MIEI PROGETTI\aruco marker\Debug\aruco marker.exe : fatal error LNK1120: 6 esterni non risolti
========== Compilazione: 0 completate, 1 non riuscite, 0 aggiornate, 0 ignorate ==========

I linked all possible opencv libraries (on linker-->input), but I have the same errors.

Can someone help me? Thanks.

Hi! I have a similar problem (error LNK2019: ....) and also I'm on win7 x64. How i can change (step by step) the project settings to x64??

Thanks!

no idea why this exception? I also linked the nonfree (static) library (Project --> property --> Linker --> input --> additional directives). May be the cause?

I changed it as you suggested, but the problem remains .. It doesn't come in the main function, because doesn't print my test string (printf("uff\n")).

Thank you!

H

HI! I'm new to OpenCV .. I installed OpenCV 2.4.3 on Windows 7 with Visual Studio 2010 Express from this guide: http://docs.opencv.org/doc/tutorials/introduction/windows_install/windows_install.html

And everything went ok up to step 7. Here when I open the solution 'OpenCV' and I try to debug it, I get this error:

Unable to start program C:\Users\Cristina\Desktop\OpenCV\Progetti\Debug\ALL_BUILD Cannot find the specified file

The ALL_BUILD program is in: C:\Users\Cristina\Desktop\OpenCV\Progetti, so I copied it in C:\Users\Cristina\Desktop\OpenCV\Progetti\Debug, but I still get the same error.

Can someone help me??

Thanks in advance