opencv-腐蝕和膨脹

兩個基本的形态學操作：腐蝕和膨脹！其作用如下所述：

1.去除噪聲

2.孤立圖像中的元素，向圖像中添加獨立的元素

3.查找圖像中的強度空洞

實作代碼如下：

#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "highgui.h"
#include <stdlib.h>
#include <stdio.h>

using namespace cv;

//全局變量
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;

//函數頭聲明
void Erosion( int, void* );
void Dilation( int, void* );

int main( int argc, char** argv )
{
  //加載圖像
  src = imread( argv[1] );
  if( !src.data )
    { return -1; }

  //建立顯示視窗
  namedWindow( "Erosion Demo", CV_WINDOW_AUTOSIZE );
  namedWindow( "Dilation Demo", CV_WINDOW_AUTOSIZE );
  cvMoveWindow( "Dilation Demo", src.cols, 0 );


  //建立腐蝕跟蹤條
  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 );


  //建立膨脹跟蹤條
  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 );

  //預設重置開始
  Erosion( 0, 0 );
  Dilation( 0, 0 );

  waitKey(0);
  return 0;
}

//腐蝕函數
void Erosion( int, void* )
{
  int erosion_type;
  if( erosion_elem == 0 ){ erosion_type = MORPH_RECT; }//長方形
  else if( erosion_elem == 1 ){ erosion_type = MORPH_CROSS; }//十字形
  else if( erosion_elem == 2) { erosion_type = MORPH_ELLIPSE;}//橢圓

  //erosin_type腐蝕類型，size處理核視窗大小，point錨點，即定位處理像素點
  Mat element = getStructuringElement( erosion_type,Size( 2*erosion_size + 1, 2*erosion_size+1 ), Point( erosion_size, erosion_size ) );
  
  //應用腐蝕操作element預設使用3*3的處理核視窗
  erode( src, erosion_dst, element );
  imshow( "Erosion Demo", erosion_dst );
}

//膨脹函數
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 ) );
  //應用膨脹操作
  dilate( src, dilation_dst, element );
  imshow( "Dilation Demo", dilation_dst );
}