场景

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    前期进行了二值化处理，车辆和道路存在连通区域，实际上，就没有必要再次进行形态学的算法处理，不过为了练习使用膨胀和腐蚀，并且了解函数的基本使用，还是进行了处理

代码

#include "cv.h"

#include "highgui.h"

#include "opencv2/opencv.hpp"

using namespace cv;

Mat srcMat, 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;

void Erosion( int, void* );

void Dilation( int, void* );

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 ) );

  /// 腐蚀操作

  erode( srcMat, erosion_dst, element );

  imshow( "Erosion Demo", erosion_dst );

}

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 ) );

  ///膨胀操作

  dilate( srcMat, dilation_dst, element );

  imshow( "Dilation Demo", dilation_dst );

}

int main() {

  srcMat = imread( "D:/20170601092226.png" );

  if( !srcMat.data ) return -1;

  cvtColor(srcMat, srcMat, CV_BGR2GRAY);

  threshold(srcMat, srcMat, 100, 255, CV_THRESH_BINARY);

  namedWindow( "Erosion Demo", CV_WINDOW_AUTOSIZE );

  namedWindow( "Dilation Demo", CV_WINDOW_AUTOSIZE );

  cvMoveWindow( "Dilation Demo", srcMat.cols, 0 );

  /// 创建腐蚀 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 );

  /// 创建膨胀 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 );

  Erosion( 0, 0 );

  Dilation( 0, 0 );

  waitKey(0);

  return 0;

}

网站名称：膨胀腐蚀对静态车辆检测
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