圖像的形態學操作

#include <opencv4/opencv2/opencv.hpp>#include <iostream>
using namespace cv;using namespace std;void drawState(Mat &img,int number,Mat centroids,Mat stats,String str);
int main(){        Mat src=(Mat_<uchar>(6,6)<<0,0,0,0,255,0,                               0,255,255,255,255,255,                               0,255,255,255,255,0,                               0,255,255,255,255,0,                               0,255,255,255,255,0,                               0,0,0,0,0,0);    Mat struct1,struct2;    struct1=getStructuringElement(0,Size(3,3));    struct2=getStructuringElement(1,Size(3,3));    Mat erodeSrc;    erode(src,erodeSrc,struct2);    namedWindow("src",WINDOW_GUI_NORMAL);    namedWindow("erodeSrc",WINDOW_GUI_NORMAL);    imshow("src",src);    imshow("erodeSrc",erodeSrc);    cout<<"文字腐蝕驗證"<<endl;    waitKey(0);
    Mat black=imread("/home/zja/Pictures/Black1.png");    Mat erode_black1,erode_black2;        erode(black,erode_black1,struct1);    erode(black,erode_black2,struct2);    imshow("black",black);    imshow("erode_black1",erode_black1);    imshow("erode_black2",erode_black2);    cout<<"驗證腐蝕對小連通域的去除"<<endl;    waitKey(0);
    Mat star=imread("/home/zja/Pictures/star.jpg");    Mat star2;    copyTo(star,star2,star);    Mat wink,winkBW;        cvtColor(star,wink,COLOR_BGR2GRAY);    threshold(wink,winkBW,50,255,THRESH_BINARY);
    Mat out,stats,centroids;        int number=connectedComponentsWithStats(winkBW,out,stats,centroids,8,CV_16U);    drawState(star,number,centroids,stats,"未腐蝕時統計連通域");
    erode(winkBW,winkBW,struct1);    number=connectedComponentsWithStats(winkBW,out,stats,centroids,8,CV_16U);    drawState(star2,number,centroids,stats,"腐蝕後統計連通域");
waitKey(0);return 0;}void drawState(Mat &img,int number,Mat centroids,Mat stats,String str){    RNG rng(10086);    vector<Vec3b> colors;    for(int i=0;i<number;i++)    {                Vec3b vec3=Vec3b(rng.uniform(0,256),rng.uniform(0,256),rng.uniform(0,256));        colors.push_back(vec3);    }    for(int i=1;i<number;i++)    {              int center_x=centroids.at<double>(i,0);       int center_y=centroids.at<double>(i,1);              int x=stats.at<int>(i,CC_STAT_LEFT);       int y=stats.at<int>(i,CC_STAT_TOP);       int w=stats.at<int>(i,CC_STAT_WIDTH);       int h=stats.at<int>(i,CC_STAT_HEIGHT);              circle(img,Point(center_x,center_y),2,Scalar(0,255,0),2,8,0);              Rect rect(x,y,w,h);       rectangle(img,rect,colors[i],1,8,0);       putText(img,format("%d",i),Point(center_x,center_y),FONT_HERSHEY_SIMPLEX,0.5,Scalar(0,0,255),1);    }    imshow(str,img);}