How to fit a circle in the marked area of the image?

I want to fit a circle at the peak (the marked area) of the wavy surface. How can I do that?

Answer 1

[KSSV]

If you fix the center C, radius R of the circle. You can plot circle using.

C = rand(1,2) ;   % center of circle 
R = 1. ;          % Radius of the circle 
th = linspace(0,2*pi) ;
x = C(1)+R*cos(th) ;
y = C(2)+R*sin(th) ;
plot(x,y) ;

Answer 2

[Image Analyst]

Using the (x,y) coordinates, you can fit a circle using the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_can_I_fit_a_circle_to_a_set_of_XY_data.3F