Morphology code 1 added to tutorial-code/Image_Processing

samples/cpp/tutorial_code/Image_Processing/Morphology_1.cpp

+/**
+ * @file Morphology_1.cpp
+ * @brief Erosion and Dilation sample code
+ * @author OpenCV team
+ */
+
+#include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/highgui/highgui.hpp"
+#include "highgui.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+using namespace cv;
+
+/// Global variables
+Mat src, erosion_dst, dilation_dst;
+
+int erosion_elem = 0;
+int erosion_size = 0;
+int dilation_elem = 0;
+int dilation_size = 0;
+int const max_elem = 2;
+int const max_kernel_size = 21;
+
+/** Function Headers */
+void Erosion( int, void* );
+void Dilation( int, void* );
+
+/**
+ * @function main
+ */
+int main( int argc, char** argv )
+{
+  /// Load an image
+  src = imread( argv[1] );
+
+  if( !src.data )
+    { return -1; }
+    
+  /// Create windows
+  namedWindow( "Erosion Demo", CV_WINDOW_AUTOSIZE );
+  namedWindow( "Dilation Demo", CV_WINDOW_AUTOSIZE );
+  cvMoveWindow( "Dilation Demo", src.cols, 0 );
+
+  /// Create Erosion Trackbar
+  createTrackbar( "Element:\n 0: Rect \n 1: Cross \n 2: Ellipse", "Erosion Demo", 
+		  &erosion_elem, max_elem, 
+		  Erosion );
+
+  createTrackbar( "Kernel size:\n 2n +1", "Erosion Demo", 
+		  &erosion_size, max_kernel_size,
+		  Erosion );
+
+  /// Create Dilation Trackbar
+  createTrackbar( "Element:\n 0: Rect \n 1: Cross \n 2: Ellipse", "Dilation Demo", 
+		  &dilation_elem, max_elem, 
+		  Dilation );
+
+  createTrackbar( "Kernel size:\n 2n +1", "Dilation Demo", 
+		  &dilation_size, max_kernel_size,
+		  Dilation ); 
+
+  /// Default start
+  Erosion( 0, 0 );
+  Dilation( 0, 0 );
+
+  waitKey(0);
+  return 0;
+}
+
+/** 
+ * @function Erosion
+ */
+void Erosion( int, void* )
+{
+  int erosion_type;
+  if( erosion_elem == 0 ){ erosion_type = MORPH_RECT; }
+  else if( erosion_elem == 1 ){ erosion_type = MORPH_CROSS; }
+  else if( erosion_elem == 2) { erosion_type = MORPH_ELLIPSE; }
+
+  Mat element = getStructuringElement( erosion_type, 
+				       Size( 2*erosion_size + 1, 2*erosion_size+1 ),
+				       Point( erosion_size, erosion_size ) ); 
+  /// Apply the erosion operation
+  erode( src, erosion_dst, element );
+  imshow( "Erosion Demo", erosion_dst );  
+}
+
+/** 
+ * @function Dilation
+ */
+void Dilation( int, void* )
+{
+  int dilation_type;
+  if( dilation_elem == 0 ){ dilation_type = MORPH_RECT; }
+  else if( dilation_elem == 1 ){ dilation_type = MORPH_CROSS; }
+  else if( dilation_elem == 2) { dilation_type = MORPH_ELLIPSE; }
+
+  Mat element = getStructuringElement( dilation_type, 
+				       Size( 2*dilation_size + 1, 2*dilation_size+1 ),
+				       Point( dilation_size, dilation_size ) ); 
+  /// Apply the dilation operation
+  dilate( src, dilation_dst, element );
+  imshow( "Dilation Demo", dilation_dst );  
+}