Opencv3從頭開始（五）形態學操作之膨脹、腐蝕、開閉運算

圖像二值化

    //二值化
    cvtColor(image,image_gray,COLOR_BGR2GRAY);
    threshold(image_gray,image_thre,125,255,THRESH_BINARY);
    imshow("倉老師",image);
    imshow("倉老師黑白",image_thre);

腐蝕

    //內核,可選矩形MORPH_RECT、交叉形MORPH_CROSS、橢圓MORPH_ELLIPSE
    Mat element=getStructuringElement(MORPH_ELLIPSE,Size(5,5),Point(-1,-1));
    //腐蝕
    Mat image_erode;
    erode(image_thre,image_erode,element);
    imshow("腐蝕",image_erode);

膨脹

//膨脹
    Mat image_dilate;
    dilate(image_thre,image_dilate,element);
    imshow("膨脹",image_dilate);

開操作

 //開
    Mat image_open;
    morphologyEx(image_thre,image_open,MORPH_OPEN,element);
    imshow("開",image_open);

閉操作

//閉
    Mat image_close;
    morphologyEx(image_thre,image_close,MORPH_CLOSE,element);
    imshow("閉",image_close);

代碼：

/*
形態學操作初步
腐蝕、膨脹、開操作、閉操作
*/


#include<opencv2/opencv.hpp>
#include<opencv2/imgproc.hpp>
#include<opencv2/imgcodecs.hpp>
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<iostream>

using namespace std;
using namespace cv;

int main(int argc, char* argv[]){
    Mat image=imread("倉老師.jpg");
    Mat image_gray,image_thre;
    
    //二值化
    cvtColor(image,image_gray,COLOR_BGR2GRAY);
    threshold(image_gray,image_thre,125,255,THRESH_BINARY);


    imshow("倉老師",image_thre);
    //內核,可選矩形MORPH_RECT、交叉形MORPH_CROSS、橢圓MORPH_ELLIPSE
    Mat element=getStructuringElement(MORPH_ELLIPSE,Size(5,5),Point(-1,-1));
    //腐蝕
    Mat image_erode;
    erode(image_thre,image_erode,element);
    imshow("腐蝕",image_erode);
    //膨脹
    Mat image_dilate;
    dilate(image_thre,image_dilate,element);
    imshow("膨脹",image_dilate);
    //開
    Mat image_open;
    morphologyEx(image_thre,image_open,MORPH_OPEN,element);
    imshow("開",image_open);
    //閉
    Mat image_close;
    morphologyEx(image_thre,image_close,MORPH_CLOSE,element);
    imshow("閉",image_close);

    waitKey(0);
    return 0;
}