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;



}