opencv笔记十一（膨胀腐蚀）erode，dilate，getStructuringElement，createTrackbar

膨胀：dilate(Mat src,Mat out,Mat getStructuringElement)；

腐蚀：erode(Mat src,Mat out,Mat getStructuringElement)；

动态调整结构元素大小：

createTrackbar(const String & trackbarname, const String winName, int* value, int count, Trackbarcallback func, void* userdata=0)

函数详解：https://blog.csdn.net/keith_bb/article/details/53174484

  
  
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace cv;

Mat src, dst;
char OUTPUT_WIN[] = "output image";
int element_size = 3;
int max_size = 21;
void CallBack_Demo(int, void*);
int main(int argc, char** argv) {

src = imread( "D:/vcprojects/images/test1.png");
if (!src.data) {
printf( "could not load image...\n");
return -1;
}
namedWindow( "input image", CV_WINDOW_AUTOSIZE);
imshow( "input image", src);

namedWindow(OUTPUT_WIN, CV_WINDOW_AUTOSIZE);
createTrackbar( "Element Size :", OUTPUT_WIN, &element_size, max_size, CallBack_Demo);
CallBack_Demo( 0, 0);

waitKey( 0);
return 0;
}

void CallBack_Demo(int, void*) {
int s = element_size * 2 + 1;
Mat structureElement = getStructuringElement(MORPH_RECT, Size(s, s), Point( -1, -1));
// dilate(src, dst, structureElement, Point(-1, -1), 1);
erode(src, dst, structureElement);
imshow(OUTPUT_WIN, dst);
return;
}
  
  

膨胀：dilate(Mat src,Mat out,Mat getStructuringElement)；