OpenCV error : Assertion failed ((img.depth() == CV_8U || img.depth() == CV_32F)

Question

When i try to run this code in Visual Studio 2010 from here . i am getting the following error

OpenCV Error: Assertion failed ((img.depth() == CV_8U || img.depth() == CV_32F)
&& img.type() == templ.type()) in cv::matchTemplate, file ..\..\..\..\opencv\mod
ules\imgproc\src\templmatch.cpp, line 249
An exception occured

Answer 1

It seems you don't load images successfully. So make sure you pass in images correctly by setting argv[] . Pay attention to the following lines of the code:

   if(argc <= 1)  
      {  
      std::cout<<"\n Help "<<std::endl;  
      std::cout<<"\n ------------------------------------\n"<<std::endl;  
      std::cout<<"./blink_detect open_eye.jpg close_eye.jpg\n"<<std::endl;  
     std::cout<<"Eg :: ./blink_detect 2.jpg 3.jpg\n"<<std::endl;  
      std::cout<<"\n ------------------------------------\n"<<std::endl;  
      exit(0);  
      }   
    ... ...
    img1 = imread( argv[1], 1 );  
    img2 = imread( argv[2], 1 );  

---

Edit : You can set argv[] in two ways:

1. Through project's command arguments:

   Project > Configuration Properties > Debugging > Command Arguments > 2.jpg 3.jpg

2. Directly in the source code:

    argc = 3; argv[1] = "2.jpg"; argv[2] = "3.jpg";