Can not read image in opencv

Question

I am new to opencv and I am starting to make a simple code to read and display image in gui ,I am working in qt IDE, first I wirte this block of code

#includ         


        

Answer 1

As you said following code showed you that file not exist:

QFile file("image.jpg");
     if(file.exists())
         cout<<"\n exist \n"<

Solution:

First of all, try to set full path to your image. For some reasons Qt search your file in wrong place, so set full path.

For example:

cv::Mat image=cv::imread("G:\\2\\qt.jpg");
QFile file("G:\\2\\qt.jpg");
if(file.exists())
    cout<<"\n exist \n"<

Or UNIX style:

cv::Mat image=cv::imread("G:/2/qt.jpg");
QFile file("G:/2/qt.jpg");
if(file.exists())
    qDebug()<<"\n exist \n"<