Reorganized code and added Morphology 2 cpp code

samples/cpp/tutorial_code/ImgProc/AddingImages.cpp

@@ -0,0 +1,52 @@
+/**
+ * @file AddingImages.cpp
+ * @brief Simple linear blender ( dst = alpha*src1 + beta*src2 )
+ * @author OpenCV team
+ */
+
+#include <cv.h>
+#include <highgui.h>
+#include <iostream>
+
+using namespace cv;
+
+/**
+ * @function main
+ * @brief Main function 
+ */
+int main( int argc, char** argv )
+{
+
+   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("../images/LinuxLogo.jpg");
+   src2 = imread("../images/WindowsLogo.jpg");
+
+   if( !src1.data ) { printf("Error loading src1 \n"); return -1; }
+   if( !src2.data ) { printf("Error loading src2 \n"); return -1; }
+
+   /// Create Windows
+   namedWindow("Linear Blend", 1);
+
+   beta = ( 1.0 - alpha );
+   addWeighted( src1, alpha, src2, beta, 0.0, dst);
+  
+   imshow( "Linear Blend", dst );
+
+
+   waitKey(0);
+   return 0;
+}