#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <iostream>
#include<stdlib.h>
using namespace cv;

/**
 * @function main
 * @brief Main function
 */
int main( void )
{

   double alpha = 0.5; double beta; double input;

   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;

   // We use the alpha provided by the user iff it is between 0 and 1
   if( alpha >= 0 && alpha <= 1
 
 )
     { alpha = input; }

   /// Read image ( same size, same type )
   src1 = imread("D:\\software_anz\\opencv\\opencv\\sources\\samples\\data\\LinuxLogo.jpg");
   src2 = imread("D:\\software_anz\\opencv\\opencv\\sources\\samples\\data\\WindowsLogo.jpg");

   if( src1.empty() ) { std::cout<< "Error loading src1"
 
<<std::endl; return -1; }
   if( src2.empty() ) { std::cout<< "Error loading src2"<<std::endl; return -1; }

   /// Create Windows
   namedWindow("Linear Blend", 1);

   beta = ( 1.0 - alpha );
   addWeighted( src1, alpha, src2, beta, 0.0, dst);//dst=src1*alpha+src2*beta+gamma;
   //void addWeighted(InputArray src1,double alpha,InputArray src2,double beta,double gamma,OutputArray dst,int dtype=-1)
   imshow( "Linear Blend", dst );
   waitKey(0);
   system("pause");
   return 0;
}