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Question

I'm trying to load an image onto a window with OpenCV but I keep on getting a breakpoint at Imshow . Here is the code I followed from a tutorial.

     namedWindow("result", CV_WINDOW_AUTOSIZE );

    Mat image ;
   // image = imread( "Particle", 1 );
    String inputName;

    for( int i = 1; i < argc; i++ )
    {
        inputName.assign( argv[i] );
    }
    if( inputName.empty() || (isdigit(inputName.c_str()[0]) && inputName.c_str()[1] == '\0') )
    {
        if( inputName.size() )
        {
            image = imread("Particle.png", 1 );
        }
        else
        {
            if(image.empty()) cout << "Couldn't read image" << endl;
        }
        imshow("result",image);

}

What's the message coming with your "breakpoint" ? Did you get into the "Couldn't read image" condition ? If so that probably explains why imshow is crashing... Put your own breakpoint at imshow line, run your application in debug configuration, then check your variables. — CTZStef
– CTZStef, Commented Jul 28, 2013 at 18:22
signal SIGABRT is the breakpoint. I'm also getting one at string imgpath=... — Andrea F
– Andrea F, Commented Jul 28, 2013 at 19:35
Abort() called on some internal error. Do you know how to debug a program ? My guess is you don't give the right input to your program in the command line. — CTZStef
– CTZStef, Commented Jul 28, 2013 at 19:45
Im just compiling in Xcode so no command line and I don't know how to debug this problem. Pretty new to programming — Andrea F
– Andrea F, Commented Jul 28, 2013 at 20:04

CharlesB · Accepted Answer · 2013-07-28 18:32:56Z

1

oh, dear, no idea where you found that 'tutorial', but it's making a lot of 'special' assumptions there, that might not fit your actual situation

try something more simple instead:

int main(int argc, char **argv) {
    string imgpath = argv[1];  // call me : prog imgpath [on the cmdline]
    Mat m = imread(imgpath);
    imshow("lala", m);
    waitKey(0);
}

edited Jul 28, 2013 at 18:32

CharlesB

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answered Jul 28, 2013 at 18:27

berak

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