message: Code easier to read now
  Increase readability by using namespace std
diff: #include <iostream>
  using namespace cv;
  +using namespace std;
  /**
  * @function main
  @@ -21,10 +22,10 @@ int main( void )
  Mat src1, src2, dst;
  /// Ask the user enter alpha
  - std::cout<<" Simple Linear Blender "<<std::endl;
  - std::cout<<"-----------------------"<<std::endl;
  - std::cout<<"* Enter alpha [0-1]: ";
  - std::cin>>input;
  + cout << " Simple Linear Blender " << endl;
  + cout << "-----------------------" << endl;
  + cout << "* Enter alpha [0-1]: ";
  + cin >> input;
  // We use the alpha provided by the user if it is between 0 and 1
  if( alpha >= 0 && alpha <= 1 )
  @@ -36,8 +37,8 @@ int main( void )
  src2 = imread( "../data/WindowsLogo.jpg" );
  //![load]
  - if( src1.empty() ) { std::cout<< "Error loading src1"<<std::endl; return -1; }
  - if( src2.empty() ) { std::cout<< "Error loading src2"<<std::endl; return -1; }
  + if( src1.empty() ) { cout << "Error loading src1" << endl; return -1; }
  + if( src2.empty() ) { cout << "Error loading src2" << endl; return -1; }
  //![blend_images]
  beta = ( 1.0 - alpha );
  