ArUco - unhandled exception

Question

I have set up ArUco library and now want to write a small code to test if it is working correctly. The code is as below:

#include<opencv2/opencv.hpp>
#include<iostream>
#include<aruco.h>
#include<cvdrawingutils.h>

using namespace cv;
using namespace std;
using namespace aruco;

int main()
{
    Mat image;
    //Read image and display it
    image = imread("E:/../Capture.PNG", 1);
    if (image.empty()) //check whether the image is loaded or not
    {
        cout << "Error : Image cannot be loaded..!!" << endl;
        //system("pause"); //wait for a key press
        return -1;
    }
    namedWindow("Image", CV_WINDOW_AUTOSIZE);
    imshow("Image", image);
    waitKey(1000);

    //Marker detection
    MarkerDetector MDetector;
    vector<Marker> Markers;

   //I am not sure if we need to read the pattern of the marker. So I read it.
    Markers = imread("E:/.../pattern.PNG", 1);
    MDetector.detect(image, Markers);

    //draw infor and its boundaries
    for (int i = 0; i < Markers.size(); i++)
    {
        Markers[i].draw(image, Scalar(0, 0, 255), 2);
    }
    imshow("ouput", image);
    waitKey(0);
}

This code builds with zero error, but when I run it, it gives me error.
Error is:

This is what I get when I hit break.

I use Windows 8.1, Microsoft visual studio 2013, opencv 3.0 and ArUco 1.3.0
Any help would be helpful. Thank you very much for help.

This may sound obvious, but why didn't you just hit *"Break"*, and have a look at the callstack yourself? — IInspectable, Feb 05 '16 at 12:07
@IInspectable I do not understand what the error is, that is the reason I posted it here. I have edited the question and added what I get while break is clicked. I hope you can point out where my mistake is. Thank you. — SNS, Feb 05 '16 at 13:37
You need to get debug symbols for opencv, and whatever else is towards the top of the callstack. See [Debugging with Symbols](https://msdn.microsoft.com/en-us/library/windows/desktop/ee416588.aspx) for instructions on setting up your development environment to use debug symbols. — IInspectable, Feb 05 '16 at 13:42
Ok thank you @IInspectable . This same code works fine until I added the pattern reading line. It works fine for just openCv. I am guessing the problem is with the ArUco code. — SNS, Feb 05 '16 at 14:41

score 0 · Accepted Answer · answered Feb 05 '16 at 18:42

This question is solved. I was making use of wrong marker pattern. we are supposed to use the marker pattern provided by ArUco. You can find generate them here: http://terpconnect.umd.edu/~jwelsh12/enes100/markergen.html
There were mistake in the code too. The correct code is below:

#include<opencv2/opencv.hpp>
#include<iostream>
#include<aruco.h>
#include<cvdrawingutils.h>

using namespace cv;
using namespace std;
using namespace aruco;

int main()
{
    Mat image;
    //Read image and display it
    image = imread("E:/Studies/Master Thesis/Markers/arucoTest.PNG", 1);
    if (image.empty()) //check whether the image is loaded or not
    {
        cout << "Error : Image cannot be loaded..!!" << endl;
        //system("pause"); //wait for a key press
        return -1;
    }
    namedWindow("Image", CV_WINDOW_AUTOSIZE);
    imshow("Image", image);
    waitKey(1000);

    //Marker detection
    MarkerDetector MDetector;
    vector<Marker> Markers;
    MDetector.detect(image, Markers);

    //draw information and its boundaries
    for (unsigned int i = 0; i<Markers.size(); i++) {
        cout << Markers[i] << endl;
        Markers[i].draw(image, Scalar(0, 0, 255), 2);
    }
    imshow("ouput", image);
    waitKey(0);
}

I hope this test code helps newbies to ArUco(others like me).

ArUco - unhandled exception

1 Answers1