superimpose extremas of region on image

hello everyone im a beginner in matlab. could anybody help me please: i have found the extremas of a region wich comes frome extrema property of 'regionprops'command. this 'extrema' matrix is a 8-by-2 matrix. now, i want to show this 8 points on my original image. could anybody help me how can i do this?

s=regionprops(im6,'all'); Extremas=cat(1,s.Extrema);

Answer 1

[Image Analyst]

Why not try plot()?

[tala]

thanks for your attention

areas=cat(1,s.Area);
[~,ind]=max(areas);
Extremas=cat(1,s.Extrema);
% figure;imshow(img)
% hold on
% plot(Extremas(ind),Extremas(ind), 'b*')
% hold off

I have written this but it doesn't show anything.

[Image Analyst]

Try removing the % at the beginning of the line to uncomment them. And then getting x and y coordinates from s.Extrema.