Unable to load an image - Open CV not working with Visual Studio2019

asked 2019-06-20 07:53:31 -0500

updated 2019-07-01 22:51:34 -0500

supra56 gravatar image

Hi guys,

I have just set up open cv4.1.0 with visual studio 2019 on windows 10. My simple code for loading the image is as under. Code:

int main()
{
    Mat imag;

       // LOAD image
       imag = imread("D:\\image2.png");   // Read the file "image.jpg".
              //This file "image.jpg" should be in the project folder.
              //Else provide full address : "D:/images/image.jpg"

       if(imag.empty() )  // Check for invalid inputf
       {
              cout <<  "Could not open or find the image" << std::endl ;
              return -1;
       }

       //DISPLAY image
       namedWindow("Window1", WINDOW_AUTOSIZE); // Create a window for display.
       imshow("Window1", imag); // Show our image inside it.

       //SAVE image
       imwrite("result1.jpg",imag);// it will store the image in name "result.jpg"

       waitKey(5000);                       // Wait for a keystroke in the window
       return 0;
}

When i build this code and run it, an empty image is momentarily displayed and I get this error in the terminal window

"OpenCV Error: Assertion failed (size.width>0 && size.height>0) in cv::imshow, file C:\buildslave64\win64_amdocl\master_PackSlave-win64-vc14-shared\opencv\modules\highgui\src\window.cpp, line 281"

I have placed my image in the active directory so i have no clue why it is not being accessed

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Comments

noobs always fail at relative image paths, it's not visual studio's fault, but yours.

start with an absolute path.

I have placed my image in the active directory

relevant is the dir, where your program starts (e.g. the debug or release folder)

berak gravatar imageberak ( 2019-06-20 08:00:33 -0500 )edit

what means absolute path?

xiejing gravatar imagexiejing ( 2019-06-20 08:11:29 -0500 )edit

^^ please look it up !

berak gravatar imageberak ( 2019-06-20 08:12:08 -0500 )edit

@berak i already tried to put the image in debug folder , but also failed

xiejing gravatar imagexiejing ( 2019-06-20 08:12:58 -0500 )edit

you can also set the working directory from the project's debug settings

berak gravatar imageberak ( 2019-06-20 08:13:14 -0500 )edit

again, try harder. there is no bug, there's just you and the file system.

berak gravatar imageberak ( 2019-06-20 08:14:18 -0500 )edit

@berak I am sorry but can you help me with teamviewer ?

xiejing gravatar imagexiejing ( 2019-06-20 08:16:22 -0500 )edit

no, sorry.

berak gravatar imageberak ( 2019-06-20 08:20:37 -0500 )edit

@berak Ok no problem . so i put the image in the debug folder and then using its absolute path in code, but fails . What should i do in working directory in Project setting ?

xiejing gravatar imagexiejing ( 2019-06-20 08:43:41 -0500 )edit

@berak I have done with all possible options what i can try with , but it fails always, absolute path in code to the image file , also set the debug folder as working directory . wrong bad. What is the problem ? can you help me once more ?

xiejing gravatar imagexiejing ( 2019-06-21 03:41:47 -0500 )edit