how to middle?

i want to find middle

Answer 1

[darova]

If you have only circle on the image like below

clc,clear

I = imread('img.png');
I1 = im2bw(I,graythresh(I));        % binarize image (0,1)
[row, col] = find(I1);              % find white pixels (1 value)
ix = round( mean(col) );            % mean column
iy = round( mean(row) );            % mean row
imshow(I1)
hold on
plot(ix,iy,'or')
text(ix+10,iy+10,'CircleCenter')
hold off

[JoBrr]

Thanks mate, it works, appreciate it a lot. I get a figure window with the image and a circle in the centre.

But do know know how I may display this info in the command window when the script is executed.

Also is the value of the centre in pixels? @darova

[darova]

You can use disp() or:

% \n - next line (break line)
% %i - insert integer value
sprintf('center coordinates of a circle:\nrow = %i; column = %i;', iy, ix)

And Yes, values are in pixels

[JoBrr]

Thank you @darova much appreciated!!

[darova]

♥