OpenCV形态morphology的实例(附完整代码)

    #include "opencv2/imgproc.hpp"
    #include "opencv2/highgui.hpp"
    #include <iostream>
    using namespace cv;
    using namespace std;
    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* );
    int main( int argc, char** argv )
    {
      /// Load an image
      CommandLineParser parser( argc, argv, "{@input | LinuxLogo.jpg | input image}" );
      src = imread( samples::findFile( parser.get<String>( "@input" ) ), IMREAD_COLOR );
      if( src.empty() )
      {
    cout << "Could not open or find the image!\n" << endl;
    cout << "Usage: " << argv[0] << " <Input image>" << endl;
    return -1;
      }
    
      /// Create windows
      namedWindow( "Erosion Demo", WINDOW_AUTOSIZE );
      namedWindow( "Dilation Demo", WINDOW_AUTOSIZE );
      moveWindow( "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;
    }
    //![main]
    
    //![erosion]
    /** * @function Erosion
     */
    void Erosion( int, void* )
    {
      int erosion_type = 0;
      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; }
    
      //![kernel]
      Mat element = getStructuringElement( erosion_type,
                       Size( 2*erosion_size + 1, 2*erosion_size+1 ),
                       Point( erosion_size, erosion_size ) );
      //![kernel]
    
      /// Apply the erosion operation
      erode( src, erosion_dst, element );
      imshow( "Erosion Demo", erosion_dst );
    }
    //![erosion]
    
    //![dilation]
    /** * @function Dilation
     */
    void Dilation( int, void* )
    {
      int dilation_type = 0;
      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 );
    }
    //![dilation]