实验7.1

#include <bits/stdc++.h>
#include "opencv2/core.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/video.hpp"
#include "opencv2/objdetect.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/ml.hpp"
#define inf 2333333333333333
#define N 100010
#define p(a) putchar(a)
#define For(i,a,b) for(int i=a;i<=b;++i)
//by war
//2020.10.27
using namespace std;
using namespace cv;
int n,k;
Mat image,img0,out,labels,stats,centroids;
void in(int &x){
    int y=1;char c=getchar();x=0;
    while(c<'0'||c>'9'){if(c=='-')y=-1;c=getchar();}
    while(c<='9'&&c>='0'){ x=(x<<1)+(x<<3)+c-'0';c=getchar();}
    x*=y;
}
void o(int x){
    if(x<0){p('-');x=-x;}
    if(x>9)o(x/10);
    p(x%10+'0');
}

signed main(){
    srand(time(0));
    img0 = imread("/Users/war/Downloads/1.png",0);
    threshold(img0, image, 128, 255, THRESH_BINARY);
    n=connectedComponentsWithStats(image, labels, stats, centroids);
    vector<Vec3b> v(n+1);
    v[0]=Vec3b(rand()%256,rand()%256,rand()%256);
    For(i,1,n){
        v[i]=Vec3b(rand()%256,rand()%256,rand()%256);
        if(stats.at<int>(i,CC_STAT_AREA)<10000) v[i]=v[0];
    }
    out=Mat::zeros(image.size(),CV_8UC3);
    For(i,0,out.rows-1)
        For(j,0,out.cols-1){
            k=labels.at<int>(i,j);
            out.at<Vec3b>(i,j)=v[k];
        }
    imshow("out",out);
    waitKey();
    return 0;
}