How to draw consecutive circles?

k = 7. ;

N = 255 ;

x = 0:N ;

y = 0:N ;

[X,Y] = meshgrid(x,y) ;

I = 1/2*(1+sin(2*pi/N*k*X)) ;

imshow(I)

Answer 1

[DGM]

Here's an example. You'll need to adjust it for the number of cycles you want. I'm going to replicate the original image.

s = 512; % image size (assumed square)
n = 4.5; % number of cycles from center to corner

xm = n*sqrt(2)*pi; % figure out what the extents are
x = linspace(-xm,xm,s);
r = sqrt(x.^2 + x.'.^2);
M = im2uint8(0.5 - cos(r)/2);

imshow(M)

[jorji]

Thank you very much for your accurate guidance.