Reorganized code and added Morphology 2 cpp code

samples/cpp/tutorial_code/Basic/DisplayImage.cpp

-/**
- * @file DisplayImage.cpp
- * @brief Sample code that show how to read and display an image in a OpenCV window
- * @author OpenCV team
- */
-#include <cv.h>
-#include <highgui.h>
-
-using namespace cv;
-
-int main( int argc, char** argv )
-{
-   Mat image;
-   image = imread( argv[1], 1 );
-
-   if( argc != 2 || !image.data )
-     { 
-       printf( "No image data \n" );
-       return -1; 
-     }
-
-   namedWindow( "Display Image", CV_WINDOW_AUTOSIZE );
-   imshow( "Display Image", image );
-
-   waitKey(0);
-
-   return 0;
-}

samples/cpp/tutorial_code/Basic/LoadSaveImage.cpp

-/**
- * @file LoadSaveImage.cpp
- * @brief Sample code that load an image, modify it and save the new image.  
- * @author OpenCV team
- */
-
-#include <cv.h>
-#include <highgui.h>
-
-using namespace cv;
-
-/**
- * @function main
- * @brief Self-explanatory
- */
-int main( int argc, char** argv )
-{
-  /// Get the name of the file to be loaded
-  char* imageName = argv[1];
-
-  /// Create a Mat object
-  Mat image;
-  
-  /// Load the image using imread
-  image = imread( imageName, 1 );
-  
-  /// Verify that the image was loaded
-  if( argc != 2 || !image.data )
-    {
-      printf( " No image data \n " );
-      return -1;
-    }
-
-  /// Change the image to Grayscale
-  Mat gray_image;
-  cvtColor( image, gray_image, CV_RGB2GRAY );
-
-  /// Save our gray image
-  imwrite( "../images/Gray_Image.png", gray_image );
-
-  /// Create a couple of windows and show our images
-  namedWindow( imageName, CV_WINDOW_AUTOSIZE );
-  namedWindow( "Gray image", CV_WINDOW_AUTOSIZE );
-
-  imshow( imageName, image );
-  imshow( "Gray image", gray_image ); 
-
-  /// Wait until user finish the application   
-  waitKey(0);
-
-  return 0;
-}

samples/cpp/tutorial_code/ImgProc/Morphology_2.cpp

+/**
+ * @file Morphology_2.cpp
+ * @brief Advanced morphology Transformations sample code
+ * @author OpenCV team
+ */
+
+#include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/highgui/highgui.hpp"
+#include <stdlib.h>
+#include <stdio.h>
+
+using namespace cv;
+
+/// Global variables
+Mat src, dst;
+
+int morph_elem = 0;
+int morph_size = 0;
+int morph_operator = 0;
+int const max_operator = 4;
+int const max_elem = 2;
+int const max_kernel_size = 21;
+
+char* window_name = "Morphology Transformations Demo";
+
+
+/** Function Headers */
+void Morphology_Operations( int, void* );
+
+/**
+ * @function main
+ */
+int main( int argc, char** argv )
+{
+  /// Load an image
+  src = imread( argv[1] );
+
+  if( !src.data )
+    { return -1; }
+    
+  /// Create window
+  namedWindow( window_name, CV_WINDOW_AUTOSIZE );
+
+  /// Create Trackbar to select Morphology operation
+  createTrackbar("Operator:\n 0: Opening - 1: Closing  \n 2: Gradient - 3: Top Hat \n 4: Black Hat", window_name, &morph_operator, max_operator, Morphology_Operations );
+
+  /// Create Trackbar to select kernel type
+  createTrackbar( "Element:\n 0: Rect - 1: Cross - 2: Ellipse", window_name, 
+		  &morph_elem, max_elem, 
+		  Morphology_Operations );
+
+  /// Create Trackbar to choose kernel size
+  createTrackbar( "Kernel size:\n 2n +1", window_name, 
+		  &morph_size, max_kernel_size,
+		  Morphology_Operations );
+
+  /// Default start
+  Morphology_Operations( 0, 0 );
+
+  waitKey(0);
+  return 0;
+}
+
+/** 
+ * @function Morphology_Operations
+ */
+void Morphology_Operations( int, void* )
+{
+
+  // Since MORPH_X : 2,3,4,5 and 6
+  int operation = morph_operator + 2;
+
+  Mat element = getStructuringElement( morph_elem, Size( 2*morph_size + 1, 2*morph_size+1 ), Point( morph_size, morph_size ) ); 
+
+  /// Apply the specified morphology operation
+  morphologyEx( src, dst, operation, element );
+  imshow( window_name, dst );  
+}
+
+