how do I find the smallest object in a binary coins image ?

How to find the smallest object in the image below I would appreciate it if you could help

Answer 1

[Yusuf Suer Erdem]

check imfindcircles command. there are multiple similar examples on matlab help center. try to adapt yours to them.

Answer 2

[yanqi liu]

clc; clear all; close all;
im=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/826480/image.png');
bw=im2bw(im);
bw=imclearborder(imfill(bw,'holes'));
%  find the smallest object 
stats=regionprops(bw);
ar=cat(1,stats.Area);
[~,ind]=min(ar);
figure; imshow(im); 
hold on; rectangle('position', stats(ind).BoundingBox, 'EdgeColor', 'g', 'LineWidth', 2)

[betty]

Thank you