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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;
}