OpenCV中读取，显示，保存图像

#include "stdafx.h"
#include <cv.h>
#include <highgui.h>
#include <iostream>
using namespace cv;
int main( int argc, char** argv )
{

   double alpha = 0.5; double beta; double input; //定义融合系数，默认是0.5

   Mat src1, src2, dst;   //定义融合前和融合后通道

   /// 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;

   if( alpha >= 0 && alpha <= 1 )
     { alpha = input; }

   src1 = imread("G:/Going/images/22.bmp"); //读取图像
   src2 = imread("G:/Going/images/11.bmp");

   if( !src1.data ) { printf("Error loading src1 \n"); return -1; }
   if( !src2.data ) { printf("Error loading src2 \n"); return -1; }
 
   namedWindow("Linear Blend", 1);  //定义窗口名称
   beta = ( 1.0 - alpha );
   addWeighted( src1, alpha, src2, beta, 0.0, dst);
  
   imshow( "Linear Blend", dst );//显示融合后图像
   waitKey(0); //等待用户按键保存，为0表示一直等待
   imwrite("hecheng.bmp",dst);  //保存后默认保存在项目文件夹中。
   system("pause");
   return 0;
}